5.25 x 8 in · 540 pages
540-page 5.25 x 8 in book: spine width & cover size
A 540-page 5.25 x 8 in paperback has a spine of 1.2161 in (30.89 mm) on white paper or 1.35 in on cream. Full cover with bleed: 11.966 x 8.25 in.
1.216 inSpine, white paper30.89 mm
1.35 inSpine, cream paper34.29 mm
11.97 x 8.25Full cover, inchesincl. bleed
564 gEstimated weight19.9 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 | 1.2161 in | 30.89 mm | 11.966 x 8.25 in | 303.9 x 209.6 mm | 3,590 x 2,475 px |
| Cream paper, black ink | 1.35 in | 34.29 mm | 12.1 x 8.25 in | 307.3 x 209.6 mm | 3,630 x 2,475 px |
| Standard color (white) | 1.2161 in | 30.89 mm | 11.966 x 8.25 in | 303.9 x 209.6 mm | 3,590 x 2,475 px |
| Premium color (white) | 1.2674 in | 32.19 mm | 12.017 x 8.25 in | 305.2 x 209.6 mm | 3,605 x 2,475 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) | 1.5429 in | 39.19 mm |
| 400 PPI | Cream book paper (~55 lb) | 1.35 in | 34.29 mm |
| 444 PPI | White book paper (~50 lb) | 1.2162 in | 30.89 mm |
| 500 PPI | Lightweight text (~45 lb) | 1.08 in | 27.43 mm |
| 600 PPI | Thin text (~40 lb) | 0.9 in | 22.86 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 11.966 x 8.25 in — or 3,590 x 2,475 px at 300 ppi.
- The back cover runs from the left edge to 5.375 in; the spine from 5.375 to 6.591 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) |
|---|---|---|---|
| 480 pages | 1.081 in | 1.2 in | 11.831 x 8.25 in |
| 490 pages | 1.1035 in | 1.225 in | 11.853 x 8.25 in |
| 500 pages | 1.126 in | 1.25 in | 11.876 x 8.25 in |
| 520 pages | 1.171 in | 1.3 in | 11.921 x 8.25 in |
| 560 pages | 1.2611 in | 1.4 in | 12.011 x 8.25 in |
| 580 pages | 1.3062 in | 1.45 in | 12.056 x 8.25 in |
| 600 pages | 1.3512 in | 1.5 in | 12.101 x 8.25 in |
540 pages in other trim sizes
| Trim | Spine (white) | Full cover (white) |
|---|---|---|
| 5 x 8 in | 1.2161 in | 11.466 x 8.25 in |
| 5.06 x 7.81 in | 1.2161 in | 11.586 x 8.06 in |
| 5.5 x 8.5 in | 1.2161 in | 12.466 x 8.75 in |
| 6 x 9 in | 1.2161 in | 13.466 x 9.25 in |
| 6.14 x 9.21 in | 1.2161 in | 13.746 x 9.46 in |
| 6.69 x 9.61 in | 1.2161 in | 14.846 x 9.86 in |
| 7 x 10 in | 1.2161 in | 15.466 x 10.25 in |
| 7.5 x 9.25 in | 1.2161 in | 16.466 x 9.5 in |
| 8 x 10 in | 1.2161 in | 17.466 x 10.25 in |
| 8.5 x 8.5 in | 1.2161 in | 18.466 x 8.75 in |
| 8.5 x 11 in | 1.2161 in | 18.466 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 540-page 5.25 x 8 in book?
On white paper it is 1.2161 in (30.89 mm); on cream paper 1.35 in (34.29 mm), using KDP's per-page factors.
What size should the full cover be?
For white paper: 11.966 x 8.25 in (303.9 x 209.6 mm) including 0.125 in bleed on every side. For cream paper: 12.1 x 8.25 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 540-page 5.25 x 8 in paperback?
About 564 g (19.9 oz) on white paper with a standard cover — useful for estimating postage.