US Mass Market Book Size
A US Mass Market book measures 4.25 × 6.87 in (106 × 172 mm). It is the US rack paperback trim, printed on lightweight groundwood paper for a low cover price, sold in drugstores, supermarkets and airports.
US Mass Market measures 106 millimetres wide and 172 millimetres tall.
US Mass Market Dimensions in Each Unit
US Mass Market is 106 × 172 mm, which is 10.6 × 17.2 cm or 4.17 × 6.77 in.
| Unit | Width | Height | Width × height | Copy |
|---|---|---|---|---|
| Millimetres (mm) | 106 | 172 | 106 × 172 mm | |
| Centimetres (cm) | 10.6 | 17.2 | 10.6 × 17.2 cm | |
| Metres (m) | 0.106 | 0.172 | 0.106 × 0.172 m | |
| Inches (in) | 4.17 | 6.77 | 4.17 × 6.77 in | |
| Feet (ft) | 0.35 | 0.56 | 0.35 × 0.56 ft | |
| Points (pt) | 300 | 488 | 300 × 488 pt | |
| Picas (pc) | 25 | 40.6 | 25 × 40.6 pc | |
| Pixels at 72 DPI | 300 | 488 | 300 × 488 px | |
| Pixels at 150 DPI | 626 | 1016 | 626 × 1016 px | |
| Pixels at 300 DPI | 1252 | 2031 | 1252 × 2031 px | |
| Pixels at 600 DPI | 2504 | 4063 | 2504 × 4063 px |
Pixel counts follow from the resolution: pixels = millimetres ÷ 25.4 × DPI. More on the DPI and pixels page.
US Mass Market Shape and Area
| Aspect ratio | 1 : 1.623 |
|---|---|
| Area | 0.0182 m² · 18,232 mm² |
| Diagonal | 202 mm · 7.95 in |
| Closest ISO size | 4.25 by 6.87 in, US rack paperback |
| Governing standard | Book trade convention (UK and US) |
US Mass Market to Scale
Put US Mass Market next to another size in the comparison tool.
Frequently Asked Questions
What size is a US mass-market paperback?
US Mass Market is 4.25 by 6.87 inches, or about 106 by 172 mm. A slightly taller 4.25 by 7.5 in premium variant also exists.
Why is mass-market paper rougher?
It is printed on groundwood paper, which is cheaper and lighter than the text stock used for trade paperbacks, keeping the cover price and postage weight down.
How is it different from a trade paperback?
A trade paperback is larger, often 5.5 by 8.5 or 6 by 9 in, on better paper. Mass Market is the small rack size at the lowest price.
Book Sizes
✓ Dimensions per Publishing trade size; unit values derived by formula. Reviewed . Editorial Process →