Book thickness
How thick is a 320-page book?
A 320-page paperback is about 0.721 in (18.3 mm) thick on white paper and 0.8 in on cream — 160 sheets of paper.
0.721 inwhite paper18.3 mm
0.8 incream paper
160sheets (leaves)
Spine width by paper
| Paper | Inches | Millimetres | Centimetres |
|---|---|---|---|
| White paper, black ink | 0.7206 in | 18.3 mm | 1.83 cm |
| Cream paper, black ink | 0.8 in | 20.32 mm | 2.03 cm |
| Standard color (white) | 0.7206 in | 18.3 mm | 1.83 cm |
| Premium color (white) | 0.751 in | 19.08 mm | 1.91 cm |
Full cover size by trim
| Trim | Full cover incl. bleed (white) | Weight |
|---|---|---|
| 5 x 8 in | 10.971 x 8.25 in | 324 g |
| 5.06 x 7.81 in | 11.091 x 8.06 in | 320 g |
| 5.25 x 8 in | 11.471 x 8.25 in | 340 g |
| 5.5 x 8.5 in | 11.971 x 8.75 in | 378 g |
| 6 x 9 in | 12.971 x 9.25 in | 437 g |
| 6.14 x 9.21 in | 13.251 x 9.46 in | 457 g |
| 6.69 x 9.61 in | 14.351 x 9.86 in | 520 g |
| 7 x 10 in | 14.971 x 10.25 in | 566 g |
| 7.5 x 9.25 in | 15.971 x 9.5 in | 561 g |
| 8 x 10 in | 16.971 x 10.25 in | 646 g |
| 8.5 x 8.5 in | 17.971 x 8.75 in | 584 g |
| 8.5 x 11 in | 17.971 x 11.25 in | 755 g |
Offset papers by PPI
| PPI | Typical stock | Spine | Spine (mm) |
|---|---|---|---|
| 350 PPI | Bulky / heavy stock (~70 lb text) | 0.914 in | 23.2 mm |
| 400 PPI | Cream book paper (~55 lb) | 0.8 in | 20.3 mm |
| 444 PPI | White book paper (~50 lb) | 0.721 in | 18.3 mm |
| 500 PPI | Lightweight text (~45 lb) | 0.64 in | 16.3 mm |
| 600 PPI | Thin text (~40 lb) | 0.533 in | 13.5 mm |
Other page counts
Frequently asked questions
How thick is a 320-page book?
A 320-page paperback is about 0.721 in (18.3 mm) thick on white paper and 0.8 in on cream — 160 sheets of paper.
How many sheets of paper are in a 320-page book?
160 leaves — each sheet carries two pages, one on each side.
Can a 320-page book have text on the spine?
Yes.