8.5 x 8.5 in Square · 800 pages
800-page 8.5 x 8.5 in book: spine width & cover size
A 800-page 8.5 x 8.5 in paperback has a spine of 1.8016 in (45.76 mm) on white paper or 2 in on cream. Full cover with bleed: 19.052 x 8.75 in.
1.802 inSpine, white paper45.76 mm
2 inSpine, cream paper50.8 mm
19.05 x 8.75Full cover, inchesincl. bleed
1,424 gEstimated weight50.2 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 | 1.8016 in | 45.76 mm | 19.052 x 8.75 in | 483.9 x 222.3 mm | 5,715 x 2,625 px |
| Cream paper, black ink | 2 in | 50.8 mm | 19.25 x 8.75 in | 489 x 222.3 mm | 5,775 x 2,625 px |
| Standard color (white) | 1.8016 in | 45.76 mm | 19.052 x 8.75 in | 483.9 x 222.3 mm | 5,715 x 2,625 px |
| Premium color (white) | 1.8776 in | 47.69 mm | 19.128 x 8.75 in | 485.8 x 222.3 mm | 5,738 x 2,625 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) | 2.2857 in | 58.06 mm |
| 400 PPI | Cream book paper (~55 lb) | 2 in | 50.8 mm |
| 444 PPI | White book paper (~50 lb) | 1.8018 in | 45.77 mm |
| 500 PPI | Lightweight text (~45 lb) | 1.6 in | 40.64 mm |
| 600 PPI | Thin text (~40 lb) | 1.3333 in | 33.87 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 19.052 x 8.75 in — or 5,715 x 2,625 px at 300 ppi.
- The back cover runs from the left edge to 8.625 in; the spine from 8.625 to 10.427 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
800 pages in other trim sizes
| Trim | Spine (white) | Full cover (white) |
|---|---|---|
| 5 x 8 in | 1.8016 in | 12.052 x 8.25 in |
| 5.06 x 7.81 in | 1.8016 in | 12.172 x 8.06 in |
| 5.25 x 8 in | 1.8016 in | 12.552 x 8.25 in |
| 5.5 x 8.5 in | 1.8016 in | 13.052 x 8.75 in |
| 6 x 9 in | 1.8016 in | 14.052 x 9.25 in |
| 6.14 x 9.21 in | 1.8016 in | 14.332 x 9.46 in |
| 6.69 x 9.61 in | 1.8016 in | 15.432 x 9.86 in |
| 7 x 10 in | 1.8016 in | 16.052 x 10.25 in |
| 7.5 x 9.25 in | 1.8016 in | 17.052 x 9.5 in |
| 8 x 10 in | 1.8016 in | 18.052 x 10.25 in |
| 8.5 x 11 in | 1.8016 in | 19.052 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 800-page 8.5 x 8.5 in book?
On white paper it is 1.8016 in (45.76 mm); on cream paper 2 in (50.8 mm), using KDP's per-page factors.
What size should the full cover be?
For white paper: 19.052 x 8.75 in (483.9 x 222.3 mm) including 0.125 in bleed on every side. For cream paper: 19.25 x 8.75 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 800-page 8.5 x 8.5 in paperback?
About 1,424 g (50.2 oz) on white paper with a standard cover — useful for estimating postage.