KDP Spine Width by Page Count
The spine width of your book determines how wide the spine area is on your cover PDF. It's calculated by multiplying your page count by the paper thickness per page. Browse spine widths below.
| Page Count | B&W White | B&W Cream | Premium Color | Spine Text? |
|---|---|---|---|---|
| 24 pages | 0.0540" | 0.0600" | 0.0563" | No |
| 50 pages | 0.1126" | 0.1250" | 0.1174" | No |
| 75 pages | 0.1689" | 0.1875" | 0.1760" | No |
| 78 pages | 0.1757" | 0.1950" | 0.1831" | No |
| 79 pages | 0.1779" | 0.1975" | 0.1854" | Yes |
| 80 pages | 0.1802" | 0.2000" | 0.1878" | Yes |
| 100 pages | 0.2252" | 0.2500" | 0.2347" | Yes |
| 150 pages | 0.3378" | 0.3750" | 0.3521" | Yes |
| 200 pages | 0.4504" | 0.5000" | 0.4694" | Yes |
| 250 pages | 0.5630" | 0.6250" | 0.5867" | Yes |
| 300 pages | 0.6756" | 0.7500" | 0.7041" | Yes |
| 350 pages | 0.7882" | 0.8750" | 0.8215" | Yes |
| 400 pages | 0.9008" | 1.0000" | 0.9388" | Yes |
| 450 pages | 1.0134" | 1.1250" | 1.0562" | Yes |
| 500 pages | 1.1260" | 1.2500" | 1.1735" | Yes |
| 550 pages | 1.2386" | 1.3750" | 1.2909" | Yes |
| 600 pages | 1.3512" | 1.5000" | 1.4082" | Yes |
| 650 pages | 1.4638" | 1.6250" | 1.5256" | Yes |
| 700 pages | 1.5764" | 1.7500" | 1.6429" | Yes |
| 750 pages | 1.6890" | 1.8750" | 1.7603" | Yes |
| 800 pages | 1.8016" | 2.0000" | 1.8776" | Yes |
| 828 pages | 1.8647" | 2.0700" | 1.9433" | Yes |
Spine text requires a minimum of 79 pages on KDP. See the spine text FAQ for details.