KDP error: Barcode / ISBN placement on the cover
Where the ISBN barcode must sit on a KDP cover, the clear-zone size that triggers rejection, and how to fix your cover file in a single pass.
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Cover Design
Expert articles on KDP formatting, self-publishing, and book design for UK authors. 103 guides and counting.
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Interactive Tools & Calculators
2 free toolsKDP Cover Formatting Guide — Interactive Cover Template Calculator
Interactive KDP cover template calculator. Enter trim size, page count, and paper type to get exact cover dimensions with spine width, bleed, and safe zones. Includes visual diagram.
Use tool →KDP Spine Width Calculator — Calculate Exact Spine Measurement
Calculate the exact spine width for your KDP paperback. Enter page count and paper type to get precise spine measurements for your book cover design.
Use tool →KDP Formatting
101 articlesSpine width for a 100-page 5.06×7.81 inch KDP paperback
Exact spine width for a 100-page 5.06×7.81 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5.25×8 inch KDP paperback
Exact spine width for a 100-page 5.25×8 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5.5×8.5 inch KDP paperback
Exact spine width for a 100-page 5.5×8.5 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5×8 inch KDP paperback
Exact spine width for a 100-page 5×8 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6.14×9.21 inch KDP paperback
Exact spine width for a 100-page 6.14×9.21 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6.69×9.61 inch KDP paperback
Exact spine width for a 100-page 6.69×9.61 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6×9 inch KDP paperback
Exact spine width for a 100-page 6×9 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 7.5×9.25 inch KDP paperback
Exact spine width for a 100-page 7.5×9.25 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 7×10 inch KDP paperback
Exact spine width for a 100-page 7×10 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8.5×11 inch KDP paperback
Exact spine width for a 100-page 8.5×11 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8.5×8.5 inch KDP paperback
Exact spine width for a 100-page 8.5×8.5 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8×10 inch KDP paperback
Exact spine width for a 100-page 8×10 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.06×7.81 inch KDP paperback
Exact spine width for a 150-page 5.06×7.81 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.25×8 inch KDP paperback
Exact spine width for a 150-page 5.25×8 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.5×8.5 inch KDP paperback
Exact spine width for a 150-page 5.5×8.5 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5×8 inch KDP paperback
Exact spine width for a 150-page 5×8 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6.14×9.21 inch KDP paperback
Exact spine width for a 150-page 6.14×9.21 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6.69×9.61 inch KDP paperback
Exact spine width for a 150-page 6.69×9.61 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6×9 inch KDP paperback
Exact spine width for a 150-page 6×9 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 7.5×9.25 inch KDP paperback
Exact spine width for a 150-page 7.5×9.25 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 7×10 inch KDP paperback
Exact spine width for a 150-page 7×10 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8.5×11 inch KDP paperback
Exact spine width for a 150-page 8.5×11 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8.5×8.5 inch KDP paperback
Exact spine width for a 150-page 8.5×8.5 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8×10 inch KDP paperback
Exact spine width for a 150-page 8×10 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.06×7.81 inch KDP paperback
Exact spine width for a 200-page 5.06×7.81 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.25×8 inch KDP paperback
Exact spine width for a 200-page 5.25×8 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.5×8.5 inch KDP paperback
Exact spine width for a 200-page 5.5×8.5 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5×8 inch KDP paperback
Exact spine width for a 200-page 5×8 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6.14×9.21 inch KDP paperback
Exact spine width for a 200-page 6.14×9.21 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6.69×9.61 inch KDP paperback
Exact spine width for a 200-page 6.69×9.61 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6×9 inch KDP paperback
Exact spine width for a 200-page 6×9 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 7.5×9.25 inch KDP paperback
Exact spine width for a 200-page 7.5×9.25 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 7×10 inch KDP paperback
Exact spine width for a 200-page 7×10 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8.5×11 inch KDP paperback
Exact spine width for a 200-page 8.5×11 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8.5×8.5 inch KDP paperback
Exact spine width for a 200-page 8.5×8.5 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8×10 inch KDP paperback
Exact spine width for a 200-page 8×10 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.06×7.81 inch KDP paperback
Exact spine width for a 250-page 5.06×7.81 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.25×8 inch KDP paperback
Exact spine width for a 250-page 5.25×8 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.5×8.5 inch KDP paperback
Exact spine width for a 250-page 5.5×8.5 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5×8 inch KDP paperback
Exact spine width for a 250-page 5×8 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6.14×9.21 inch KDP paperback
Exact spine width for a 250-page 6.14×9.21 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6.69×9.61 inch KDP paperback
Exact spine width for a 250-page 6.69×9.61 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6×9 inch KDP paperback
Exact spine width for a 250-page 6×9 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 7.5×9.25 inch KDP paperback
Exact spine width for a 250-page 7.5×9.25 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 7×10 inch KDP paperback
Exact spine width for a 250-page 7×10 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8.5×11 inch KDP paperback
Exact spine width for a 250-page 8.5×11 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8.5×8.5 inch KDP paperback
Exact spine width for a 250-page 8.5×8.5 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8×10 inch KDP paperback
Exact spine width for a 250-page 8×10 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.06×7.81 inch KDP paperback
Exact spine width for a 300-page 5.06×7.81 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.25×8 inch KDP paperback
Exact spine width for a 300-page 5.25×8 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.5×8.5 inch KDP paperback
Exact spine width for a 300-page 5.5×8.5 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5×8 inch KDP paperback
Exact spine width for a 300-page 5×8 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6.14×9.21 inch KDP paperback
Exact spine width for a 300-page 6.14×9.21 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6.69×9.61 inch KDP paperback
Exact spine width for a 300-page 6.69×9.61 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6×9 inch KDP paperback
Exact spine width for a 300-page 6×9 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 7.5×9.25 inch KDP paperback
Exact spine width for a 300-page 7.5×9.25 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 7×10 inch KDP paperback
Exact spine width for a 300-page 7×10 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8.5×11 inch KDP paperback
Exact spine width for a 300-page 8.5×11 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8.5×8.5 inch KDP paperback
Exact spine width for a 300-page 8.5×8.5 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8×10 inch KDP paperback
Exact spine width for a 300-page 8×10 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.06×7.81 inch KDP paperback
Exact spine width for a 400-page 5.06×7.81 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.25×8 inch KDP paperback
Exact spine width for a 400-page 5.25×8 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.5×8.5 inch KDP paperback
Exact spine width for a 400-page 5.5×8.5 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5×8 inch KDP paperback
Exact spine width for a 400-page 5×8 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6.14×9.21 inch KDP paperback
Exact spine width for a 400-page 6.14×9.21 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6.69×9.61 inch KDP paperback
Exact spine width for a 400-page 6.69×9.61 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6×9 inch KDP paperback
Exact spine width for a 400-page 6×9 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 7.5×9.25 inch KDP paperback
Exact spine width for a 400-page 7.5×9.25 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 7×10 inch KDP paperback
Exact spine width for a 400-page 7×10 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8.5×11 inch KDP paperback
Exact spine width for a 400-page 8.5×11 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8.5×8.5 inch KDP paperback
Exact spine width for a 400-page 8.5×8.5 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8×10 inch KDP paperback
Exact spine width for a 400-page 8×10 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.06×7.81 inch KDP paperback
Exact spine width for a 50-page 5.06×7.81 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.25×8 inch KDP paperback
Exact spine width for a 50-page 5.25×8 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.5×8.5 inch KDP paperback
Exact spine width for a 50-page 5.5×8.5 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5×8 inch KDP paperback
Exact spine width for a 50-page 5×8 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6.14×9.21 inch KDP paperback
Exact spine width for a 50-page 6.14×9.21 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6.69×9.61 inch KDP paperback
Exact spine width for a 50-page 6.69×9.61 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6×9 inch KDP paperback
Exact spine width for a 50-page 6×9 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 7.5×9.25 inch KDP paperback
Exact spine width for a 50-page 7.5×9.25 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 7×10 inch KDP paperback
Exact spine width for a 50-page 7×10 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8.5×11 inch KDP paperback
Exact spine width for a 50-page 8.5×11 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8.5×8.5 inch KDP paperback
Exact spine width for a 50-page 8.5×8.5 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8×10 inch KDP paperback
Exact spine width for a 50-page 8×10 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.06×7.81 inch KDP paperback
Exact spine width for a 500-page 5.06×7.81 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.25×8 inch KDP paperback
Exact spine width for a 500-page 5.25×8 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.5×8.5 inch KDP paperback
Exact spine width for a 500-page 5.5×8.5 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5×8 inch KDP paperback
Exact spine width for a 500-page 5×8 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6.14×9.21 inch KDP paperback
Exact spine width for a 500-page 6.14×9.21 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6.69×9.61 inch KDP paperback
Exact spine width for a 500-page 6.69×9.61 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6×9 inch KDP paperback
Exact spine width for a 500-page 6×9 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 7.5×9.25 inch KDP paperback
Exact spine width for a 500-page 7.5×9.25 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 7×10 inch KDP paperback
Exact spine width for a 500-page 7×10 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8.5×11 inch KDP paperback
Exact spine width for a 500-page 8.5×11 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8.5×8.5 inch KDP paperback
Exact spine width for a 500-page 8.5×8.5 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8×10 inch KDP paperback
Exact spine width for a 500-page 8×10 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
KDP error: Cover dimensions don't match interior trim
Why KDP rejected your book for cover-interior trim mismatch — and the exact fix. UK-specific, 2026 spec.
KDP error: Cover text or critical elements in bleed zone
Why KDP rejected your cover for text in the bleed zone — and the exact fix. UK-specific, 2026 spec.
KDP error: Cover under 2560×1600 pixels
Why KDP rejected your ebook cover for being too small — and the exact fix. UK-specific, 2026 spec.
KDP error: Spine too narrow for spine text
Why KDP rejected your cover for spine text on a too-thin book — and the exact fix. UK-specific, 2026 spec.
Book Design
1 articleKDP Cover Formatting Guide — Interactive Cover Template Calculator
Interactive KDP cover template calculator. Enter trim size, page count, and paper type to get exact cover dimensions with spine width, bleed, and safe zones. Includes visual diagram.
Tools & Software
97 articlesSpine width for a 100-page 5.06×7.81 inch KDP paperback
Exact spine width for a 100-page 5.06×7.81 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5.25×8 inch KDP paperback
Exact spine width for a 100-page 5.25×8 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5.5×8.5 inch KDP paperback
Exact spine width for a 100-page 5.5×8.5 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 5×8 inch KDP paperback
Exact spine width for a 100-page 5×8 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6.14×9.21 inch KDP paperback
Exact spine width for a 100-page 6.14×9.21 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6.69×9.61 inch KDP paperback
Exact spine width for a 100-page 6.69×9.61 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 6×9 inch KDP paperback
Exact spine width for a 100-page 6×9 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 7.5×9.25 inch KDP paperback
Exact spine width for a 100-page 7.5×9.25 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 7×10 inch KDP paperback
Exact spine width for a 100-page 7×10 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8.5×11 inch KDP paperback
Exact spine width for a 100-page 8.5×11 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8.5×8.5 inch KDP paperback
Exact spine width for a 100-page 8.5×8.5 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 100-page 8×10 inch KDP paperback
Exact spine width for a 100-page 8×10 inch KDP paperback — 0.225 in on white paper, 0.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.06×7.81 inch KDP paperback
Exact spine width for a 150-page 5.06×7.81 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.25×8 inch KDP paperback
Exact spine width for a 150-page 5.25×8 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5.5×8.5 inch KDP paperback
Exact spine width for a 150-page 5.5×8.5 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 5×8 inch KDP paperback
Exact spine width for a 150-page 5×8 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6.14×9.21 inch KDP paperback
Exact spine width for a 150-page 6.14×9.21 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6.69×9.61 inch KDP paperback
Exact spine width for a 150-page 6.69×9.61 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 6×9 inch KDP paperback
Exact spine width for a 150-page 6×9 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 7.5×9.25 inch KDP paperback
Exact spine width for a 150-page 7.5×9.25 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 7×10 inch KDP paperback
Exact spine width for a 150-page 7×10 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8.5×11 inch KDP paperback
Exact spine width for a 150-page 8.5×11 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8.5×8.5 inch KDP paperback
Exact spine width for a 150-page 8.5×8.5 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 150-page 8×10 inch KDP paperback
Exact spine width for a 150-page 8×10 inch KDP paperback — 0.338 in on white paper, 0.375 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.06×7.81 inch KDP paperback
Exact spine width for a 200-page 5.06×7.81 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.25×8 inch KDP paperback
Exact spine width for a 200-page 5.25×8 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5.5×8.5 inch KDP paperback
Exact spine width for a 200-page 5.5×8.5 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 5×8 inch KDP paperback
Exact spine width for a 200-page 5×8 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6.14×9.21 inch KDP paperback
Exact spine width for a 200-page 6.14×9.21 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6.69×9.61 inch KDP paperback
Exact spine width for a 200-page 6.69×9.61 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 6×9 inch KDP paperback
Exact spine width for a 200-page 6×9 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 7.5×9.25 inch KDP paperback
Exact spine width for a 200-page 7.5×9.25 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 7×10 inch KDP paperback
Exact spine width for a 200-page 7×10 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8.5×11 inch KDP paperback
Exact spine width for a 200-page 8.5×11 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8.5×8.5 inch KDP paperback
Exact spine width for a 200-page 8.5×8.5 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 200-page 8×10 inch KDP paperback
Exact spine width for a 200-page 8×10 inch KDP paperback — 0.450 in on white paper, 0.500 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.06×7.81 inch KDP paperback
Exact spine width for a 250-page 5.06×7.81 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.25×8 inch KDP paperback
Exact spine width for a 250-page 5.25×8 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5.5×8.5 inch KDP paperback
Exact spine width for a 250-page 5.5×8.5 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 5×8 inch KDP paperback
Exact spine width for a 250-page 5×8 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6.14×9.21 inch KDP paperback
Exact spine width for a 250-page 6.14×9.21 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6.69×9.61 inch KDP paperback
Exact spine width for a 250-page 6.69×9.61 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 6×9 inch KDP paperback
Exact spine width for a 250-page 6×9 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 7.5×9.25 inch KDP paperback
Exact spine width for a 250-page 7.5×9.25 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 7×10 inch KDP paperback
Exact spine width for a 250-page 7×10 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8.5×11 inch KDP paperback
Exact spine width for a 250-page 8.5×11 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8.5×8.5 inch KDP paperback
Exact spine width for a 250-page 8.5×8.5 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 250-page 8×10 inch KDP paperback
Exact spine width for a 250-page 8×10 inch KDP paperback — 0.563 in on white paper, 0.625 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.06×7.81 inch KDP paperback
Exact spine width for a 300-page 5.06×7.81 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.25×8 inch KDP paperback
Exact spine width for a 300-page 5.25×8 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5.5×8.5 inch KDP paperback
Exact spine width for a 300-page 5.5×8.5 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 5×8 inch KDP paperback
Exact spine width for a 300-page 5×8 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6.14×9.21 inch KDP paperback
Exact spine width for a 300-page 6.14×9.21 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6.69×9.61 inch KDP paperback
Exact spine width for a 300-page 6.69×9.61 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 6×9 inch KDP paperback
Exact spine width for a 300-page 6×9 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 7.5×9.25 inch KDP paperback
Exact spine width for a 300-page 7.5×9.25 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 7×10 inch KDP paperback
Exact spine width for a 300-page 7×10 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8.5×11 inch KDP paperback
Exact spine width for a 300-page 8.5×11 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8.5×8.5 inch KDP paperback
Exact spine width for a 300-page 8.5×8.5 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 300-page 8×10 inch KDP paperback
Exact spine width for a 300-page 8×10 inch KDP paperback — 0.676 in on white paper, 0.750 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.06×7.81 inch KDP paperback
Exact spine width for a 400-page 5.06×7.81 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.25×8 inch KDP paperback
Exact spine width for a 400-page 5.25×8 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5.5×8.5 inch KDP paperback
Exact spine width for a 400-page 5.5×8.5 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 5×8 inch KDP paperback
Exact spine width for a 400-page 5×8 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6.14×9.21 inch KDP paperback
Exact spine width for a 400-page 6.14×9.21 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6.69×9.61 inch KDP paperback
Exact spine width for a 400-page 6.69×9.61 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 6×9 inch KDP paperback
Exact spine width for a 400-page 6×9 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 7.5×9.25 inch KDP paperback
Exact spine width for a 400-page 7.5×9.25 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 7×10 inch KDP paperback
Exact spine width for a 400-page 7×10 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8.5×11 inch KDP paperback
Exact spine width for a 400-page 8.5×11 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8.5×8.5 inch KDP paperback
Exact spine width for a 400-page 8.5×8.5 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 400-page 8×10 inch KDP paperback
Exact spine width for a 400-page 8×10 inch KDP paperback — 0.901 in on white paper, 1.000 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.06×7.81 inch KDP paperback
Exact spine width for a 50-page 5.06×7.81 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.25×8 inch KDP paperback
Exact spine width for a 50-page 5.25×8 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5.5×8.5 inch KDP paperback
Exact spine width for a 50-page 5.5×8.5 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 5×8 inch KDP paperback
Exact spine width for a 50-page 5×8 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6.14×9.21 inch KDP paperback
Exact spine width for a 50-page 6.14×9.21 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6.69×9.61 inch KDP paperback
Exact spine width for a 50-page 6.69×9.61 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 6×9 inch KDP paperback
Exact spine width for a 50-page 6×9 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 7.5×9.25 inch KDP paperback
Exact spine width for a 50-page 7.5×9.25 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 7×10 inch KDP paperback
Exact spine width for a 50-page 7×10 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8.5×11 inch KDP paperback
Exact spine width for a 50-page 8.5×11 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8.5×8.5 inch KDP paperback
Exact spine width for a 50-page 8.5×8.5 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 50-page 8×10 inch KDP paperback
Exact spine width for a 50-page 8×10 inch KDP paperback — 0.113 in on white paper, 0.125 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.06×7.81 inch KDP paperback
Exact spine width for a 500-page 5.06×7.81 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.25×8 inch KDP paperback
Exact spine width for a 500-page 5.25×8 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5.5×8.5 inch KDP paperback
Exact spine width for a 500-page 5.5×8.5 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 5×8 inch KDP paperback
Exact spine width for a 500-page 5×8 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6.14×9.21 inch KDP paperback
Exact spine width for a 500-page 6.14×9.21 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6.69×9.61 inch KDP paperback
Exact spine width for a 500-page 6.69×9.61 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 6×9 inch KDP paperback
Exact spine width for a 500-page 6×9 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 7.5×9.25 inch KDP paperback
Exact spine width for a 500-page 7.5×9.25 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 7×10 inch KDP paperback
Exact spine width for a 500-page 7×10 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8.5×11 inch KDP paperback
Exact spine width for a 500-page 8.5×11 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8.5×8.5 inch KDP paperback
Exact spine width for a 500-page 8.5×8.5 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
Spine width for a 500-page 8×10 inch KDP paperback
Exact spine width for a 500-page 8×10 inch KDP paperback — 1.126 in on white paper, 1.250 in on cream. Full cover-wrap dimensions and the KDP spine-width formula.
KDP Spine Width Calculator — Calculate Exact Spine Measurement
Calculate the exact spine width for your KDP paperback. Enter page count and paper type to get precise spine measurements for your book cover design.