Book Sizes
Common trade, digest, and publishing trim sizes.
Comic Book
170.2 x 260.4 mm
Mass Market
106 x 175 mm
Comic Book
Royal
Trade Paperback
Digest
Mass Market
Book Sizes Size Diagram
Comic Book6.70 in x 10.25 in
Royal6.14 in x 9.21 in
Trade Paperback6.00 in x 9.00 in
Digest5.50 in x 8.50 in
Mass Market4.17 in x 6.89 in
Book Sizes Reference Table
| Name | Width (mm) | Height (mm) | Width (cm) | Height (cm) | Width (in) | Height (in) |
|---|---|---|---|---|---|---|
| Comic Book | 170.2 | 260.4 | 17.02 | 26.04 | 6.70 | 10.25 |
| Royal | 156 | 234 | 15.60 | 23.40 | 6.14 | 9.21 |
| Trade Paperback | 152.4 | 228.6 | 15.24 | 22.86 | 6.00 | 9.00 |
| Digest | 139.7 | 215.9 | 13.97 | 21.59 | 5.50 | 8.50 |
| Mass Market | 106 | 175 | 10.60 | 17.50 | 4.17 | 6.89 |
The Story ofBook Sizes
Book trim sizes are part craft, part market logic. Publishers choose dimensions to balance readability, shelf presence, print economy, and genre expectations.
Over time, patterns emerged: trade paperbacks for broad nonfiction and fiction, digest formats for compact practicality, and specialty trims for visual or premium editions.