Book trim size
4.25 x 6.87 in — Mass-Market Paperback
4.25 x 6.87 in · 108 x 174.5 mm. The supermarket and airport rack format. Small type, thin paper and low cost made it the format of the mass-paperback era; indie authors use it mainly for series fans who collect the format.
About the 4.25 x 6.87 in format
The supermarket and airport rack format. Small type, thin paper and low cost made it the format of the mass-paperback era; indie authors use it mainly for series fans who collect the format.
Typical uses: Genre fiction reprints, Romance, Thrillers, Westerns.
How many pages will my book be at 4.25 x 6.87 in?
| Manuscript | 10 pt | 11 pt | 12 pt |
|---|---|---|---|
| 40,000 words | 234 pp | 284 pp | 344 pp |
| 60,000 words | 360 pp | 436 pp | 534 pp |
| 80,000 words | 476 pp | 602 pp | 740 pp |
| 100,000 words | 616 pp | 784 pp | 920 pp |
| 120,000 words | 770 pp | 938 pp | 1102 pp |
Estimates for a typical serif body font with 130% leading, chapter openings and front/back matter. Dialogue-heavy fiction runs longer; dense nonfiction shorter.
Spine width and cover size for 4.25 x 6.87 in
| Page count | Spine (white paper) | Spine (cream paper) | Full cover incl. bleed |
|---|---|---|---|
| 100 pages | 0.2252 in / 5.72 mm | 0.25 in / 6.35 mm | 8.975 x 7.12 in |
| 200 pages | 0.4504 in / 11.44 mm | 0.5 in / 12.7 mm | 9.2 x 7.12 in |
| 300 pages | 0.6756 in / 17.16 mm | 0.75 in / 19.05 mm | 9.426 x 7.12 in |
| 400 pages | 0.9008 in / 22.88 mm | 1 in / 25.4 mm | 9.651 x 7.12 in |
| 500 pages | 1.126 in / 28.6 mm | 1.25 in / 31.75 mm | 9.876 x 7.12 in |
Spine factors: 0.002252 in/page white, 0.0025 in/page cream (KDP published values). Other printers vary — use their template.
Margins by page count
| Pages | Min. inside (KDP) | Recommended inside | Outside | Top / bottom | Text block |
|---|---|---|---|---|---|
| 24–150 pages | 0.375 in | 0.625 in | 0.5 in | 0.625 / 0.625 in | 3.13 x 5.62 in |
| 151–300 pages | 0.5 in | 0.75 in | 0.5 in | 0.625 / 0.625 in | 3 x 5.62 in |
| 301–500 pages | 0.625 in | 0.875 in | 0.5 in | 0.625 / 0.625 in | 2.88 x 5.62 in |
| 501–700 pages | 0.75 in | 1 in | 0.5 in | 0.625 / 0.625 in | 2.75 x 5.62 in |
| 701–828 pages | 0.875 in | 1.125 in | 0.5 in | 0.625 / 0.625 in | 2.63 x 5.62 in |
Minimum inside margins are KDP's published values; recommended margins are our comfortable defaults for reading.
Two-page spread
Interior PDF page size
| Setup | Page size (in) | Page size (mm) | Full-page image at 300 ppi |
|---|---|---|---|
| No bleed (text only) | 4.25 x 6.87 | 108 x 174.5 | 1,275 x 2,061 px |
| With bleed | 4.375 x 7.12 | 111.1 x 180.8 | 1,312 x 2,136 px |
With bleed, add 0.125 in to the width (outside edge only) and 0.25 in to the height (top and bottom).
Tip: at 4.25 x 6.87 in, a novel of 80,000 words comes to roughly 602 pages at 11 pt. Try different settings in the word count calculator or build a cover with the spine width calculator.