kdp · cover size · 8 × 10 in
8 × 10 in KDP cover size and spine width
At 120 pages on white paper, an 8 × 10 in paperback needs a full cover of 16.520 × 10.250 in (419.6 × 260.4 mm) with a 0.2702 in spine. Below: every common page count on white, cream and groundwood paper, the margins, and a calculator that draws the cover guide as a PDF.
Usually picked for children's activity books, coloring books and photo books. KDP prints it from 24 to 828 pages on white paper, 24 to 776 on cream and 24 to 812 on groundwood.
Your page count at 8 × 10 in
Gives the spine and the full cover in inches, millimeters and pixels, the margins, and a PDF cover guide with the folds, safe areas and barcode box drawn in. No sign-up, 20 a day.
The formula
- spine
- pages × 0.002252 in on white paper, × 0.0025 in on cream, × 0.00235 in on groundwood, × 0.002347 in on premium color (standard color uses the white figure)
- width
- 0.125 + 8 + spine + 8 + 0.125 in: bleed, back, spine, front, bleed
- height
- 0.125 + 10 + 0.125 = 10.250 in, whatever the page count
- spine text
- only from 80 pages (KDP: more than 79), at least 0.0625 in from each fold
- cover text
- at least 0.125 in inside the trim on every side
- images
- 300 dpi at print size; one PDF, up to 650 MB (KDP suggests 40 MB or less)
spine and full cover · inches
Spine width and cover size by page count
| pages | white | cream | groundwood |
|---|---|---|---|
| 24 pages | 0.054016.304 | 0.060016.310 | 0.056416.306 |
| 40 pages | 0.090116.340 | 0.100016.350 | 0.094016.344 |
| 60 pages | 0.135116.385 | 0.150016.400 | 0.141016.391 |
| 80 pages | 0.180216.430 | 0.200016.450 | 0.188016.438 |
| 100 pages | 0.225216.475 | 0.250016.500 | 0.235016.485 |
| 120 pages | 0.270216.520 | 0.300016.550 | 0.282016.532 |
| 150 pages | 0.337816.588 | 0.375016.625 | 0.352516.603 |
| 200 pages | 0.450416.700 | 0.500016.750 | 0.470016.720 |
| 250 pages | 0.563016.813 | 0.625016.875 | 0.587516.838 |
| 300 pages | 0.675616.926 | 0.750017.000 | 0.705016.955 |
| 400 pages | 0.900817.151 | 1.000017.250 | 0.940017.190 |
| 500 pages | 1.126017.376 | 1.250017.500 | 1.175017.425 |
| 600 pages | 1.351217.601 | 1.500017.750 | 1.410017.660 |
| 700 pages | 1.576417.826 | 1.750018.000 | 1.645017.895 |
| 776 pages | 1.747617.998 | 1.940018.190 | 1.823618.074 |
| 800 pages | 1.801618.052 | not offered above 776 pages | 1.880018.130 |
| 812 pages | 1.828618.079 | not offered above 776 pages | 1.908218.158 |
| 828 pages | 1.864718.115 | not offered above 776 pages | not offered above 812 pages |
Full cover = back + spine + front with 0.125 in of bleed on every outside edge. For a page count between two rows, use the calculator, or the formula: the width grows by 0.02252 in every 10 white pages, 0.025 in on cream and 0.0235 in on groundwood.
the inside pages
Interior page size and margins
Page size
- no bleed
- 8 × 10 in · 203.2 × 254.0 mm
- with bleed
- 8.125 × 10.250 in: 0.125 in added to the outside edge, the top and the bottom
- outside
- top, bottom and outside margins at least 0.25 in, or 0.375 in with bleed
Inside margin (gutter)
| page count | at least |
|---|---|
| 24 to 150 pages | 0.375 in |
| 151 to 300 pages | 0.5 in |
| 301 to 500 pages | 0.625 in |
| 501 to 700 pages | 0.75 in |
| 701 to 828 pages | 0.875 in |
paper
Page limits at 8 × 10 in
| paper | pages | spine per page |
|---|---|---|
| white | 24 to 828 | 0.002252 in |
| cream | 24 to 776 | 0.0025 in |
| groundwood | 24 to 812 | 0.00235 in |
| standard color | 72 to 600 | 0.002252 in |
| premium color | 24 to 828 | 0.002347 in |
Groundwood is for black and white interiors only; KDP may print a book with heavy ink coverage on white or cream instead.
the inside pages too
Need the whole book, not only the cover size?
Our book maker makes sudoku, word search and maze books, and coloring books at 8 × 10 in: the interior PDF, a wrap cover sized to its page count with these numbers, and a signed check report on both files. From $3.30 a book, no subscription.
Questions
How wide is the spine of an 8 × 10 in book?
Pages × 0.002252 in on white paper, × 0.0025 in on cream or × 0.00235 in on groundwood. The trim size does not change it: 120 white pages make a 0.2702 in spine, 200 white pages 0.4504 in.
How big should the cover image be?
For 120 pages on white paper, 4956 × 3075 pixels at 300 dpi (16.520 × 10.250 in). Every 10 pages add 6.76 pixels of width on white paper, 7.5 on cream and 7.05 on groundwood.
Can I put the title on the spine?
Only from 80 pages: KDP prints spine text only on books of more than 79 pages and rejects covers with spine text below that. Keep spine text at least 0.0625 in from both folds, because the fold can move a little in printing.
Where does the barcode go?
Unless your cover file has its own barcode, KDP places one in a white box 2 × 1.2 in at the bottom right of the back cover, next to the spine. Keep any text, picture or object out of that box: KDP rejects covers with text or images where the barcode goes. Our PDF guide keeps a slightly larger area clear, 2.2 × 1.4 in, so the barcode never lands on artwork.
What if my page count is odd?
KDP prints on both sides of each sheet and rounds the page count up to an even number, so size the cover for the next even number.
all 16 standard KDP paperback sizes
Other trim sizes
Close in size: 7.44 × 9.69 in, 7 × 10 in and 7.5 × 9.25 in.
- 5 × 8
- 5.06 × 7.81
- 5.25 × 8
- 5.5 × 8.5
- 6 × 9
- 6.14 × 9.21
- 6.69 × 9.61
- 7 × 10
- 7.44 × 9.69
- 7.5 × 9.25
- 8 × 10
- 8.25 × 6
- 8.25 × 8.25
- 8.5 × 8.5
- 8.5 × 11
- A4, 8.27 × 11.69
Numbers from KDP’s paperback help pages (trim sizes, page limits, margins and bleed, cover size, spine width and spine text, the groundwood spine and barcodes), read on 21 and 22 October 2026 (ruleset kdp-paperback-2026-10-21). KDP changes its specs now and then; its own pages win.