8 x 10 in · 390 pages
390-page 8 x 10 in book: spine width & cover size
A 390-page 8 x 10 in paperback has a spine of 0.8783 in (22.31 mm) on white paper or 0.975 in on cream. Full cover with bleed: 17.128 x 10.25 in.
0.878 inSpine, white paper22.31 mm
0.975 inSpine, cream paper24.77 mm
17.13 x 10.25Full cover, inchesincl. bleed
782 gEstimated weight27.6 oz
Cover template (white paper)
Spine and cover by paper type
| Paper | Spine | Spine (mm) | Full cover (in) | Full cover (mm) | At 300 ppi |
|---|---|---|---|---|---|
| White paper, black ink | 0.8783 in | 22.31 mm | 17.128 x 10.25 in | 435.1 x 260.4 mm | 5,138 x 3,075 px |
| Cream paper, black ink | 0.975 in | 24.77 mm | 17.225 x 10.25 in | 437.5 x 260.4 mm | 5,168 x 3,075 px |
| Standard color (white) | 0.8783 in | 22.31 mm | 17.128 x 10.25 in | 435.1 x 260.4 mm | 5,138 x 3,075 px |
| Premium color (white) | 0.9153 in | 23.25 mm | 17.165 x 10.25 in | 436 x 260.4 mm | 5,150 x 3,075 px |
Per-page factors are those published by KDP; IngramSpark and offset printers use their own paper calipers.
Other printers: spine by paper PPI
| Paper PPI | Typical stock | Spine | Spine (mm) |
|---|---|---|---|
| 350 PPI | Bulky / heavy stock (~70 lb text) | 1.1143 in | 28.3 mm |
| 400 PPI | Cream book paper (~55 lb) | 0.975 in | 24.77 mm |
| 444 PPI | White book paper (~50 lb) | 0.8784 in | 22.31 mm |
| 500 PPI | Lightweight text (~45 lb) | 0.78 in | 19.81 mm |
| 600 PPI | Thin text (~40 lb) | 0.65 in | 16.51 mm |
If your printer quotes pages per inch (PPI), spine = pages ÷ PPI. Ask for the exact PPI of your chosen stock.
Designing this cover
- Build the cover canvas at 17.128 x 10.25 in — or 5,138 x 3,075 px at 300 ppi.
- The back cover runs from the left edge to 8.125 in; the spine from 8.125 to 9.003 in; the front cover after that.
- Spine text is allowed — centre it and keep 0.0625 in clear on each side.
- Keep titles and faces at least 0.25 in inside the trim; KDP places the barcode in a 2 x 1.2 in area at the lower right of the back cover.
- Export as a flattened PDF (PDF/X-1a is safest) with fonts embedded.
Nearby page counts
| Pages | Spine (white) | Spine (cream) | Full cover (white) |
|---|---|---|---|
| 330 pages | 0.7432 in | 0.825 in | 16.993 x 10.25 in |
| 340 pages | 0.7657 in | 0.85 in | 17.016 x 10.25 in |
| 350 pages | 0.7882 in | 0.875 in | 17.038 x 10.25 in |
| 360 pages | 0.8107 in | 0.9 in | 17.061 x 10.25 in |
| 370 pages | 0.8332 in | 0.925 in | 17.083 x 10.25 in |
| 380 pages | 0.8558 in | 0.95 in | 17.106 x 10.25 in |
| 400 pages | 0.9008 in | 1 in | 17.151 x 10.25 in |
| 410 pages | 0.9233 in | 1.025 in | 17.173 x 10.25 in |
| 420 pages | 0.9458 in | 1.05 in | 17.196 x 10.25 in |
| 430 pages | 0.9684 in | 1.075 in | 17.218 x 10.25 in |
| 440 pages | 0.9909 in | 1.1 in | 17.241 x 10.25 in |
| 450 pages | 1.0134 in | 1.125 in | 17.263 x 10.25 in |
390 pages in other trim sizes
| Trim | Spine (white) | Full cover (white) |
|---|---|---|
| 5 x 8 in | 0.8783 in | 11.128 x 8.25 in |
| 5.06 x 7.81 in | 0.8783 in | 11.248 x 8.06 in |
| 5.25 x 8 in | 0.8783 in | 11.628 x 8.25 in |
| 5.5 x 8.5 in | 0.8783 in | 12.128 x 8.75 in |
| 6 x 9 in | 0.8783 in | 13.128 x 9.25 in |
| 6.14 x 9.21 in | 0.8783 in | 13.408 x 9.46 in |
| 6.69 x 9.61 in | 0.8783 in | 14.508 x 9.86 in |
| 7 x 10 in | 0.8783 in | 15.128 x 10.25 in |
| 7.5 x 9.25 in | 0.8783 in | 16.128 x 9.5 in |
| 8.5 x 8.5 in | 0.8783 in | 18.128 x 8.75 in |
| 8.5 x 11 in | 0.8783 in | 18.128 x 11.25 in |
Spine width depends only on page count and paper; the cover width changes with the trim.
Frequently asked questions
How wide is the spine of a 390-page 8 x 10 in book?
On white paper it is 0.8783 in (22.31 mm); on cream paper 0.975 in (24.77 mm), using KDP's per-page factors.
What size should the full cover be?
For white paper: 17.128 x 10.25 in (435.1 x 260.4 mm) including 0.125 in bleed on every side. For cream paper: 17.225 x 10.25 in.
Can I put text on the spine?
Yes. KDP allows spine text only for books with more than 79 pages; keep it at least 0.0625 in (1.6 mm) from each spine edge.
How heavy is a 390-page 8 x 10 in paperback?
About 782 g (27.6 oz) on white paper with a standard cover — useful for estimating postage.