US Trade Book Size
A US Trade book measures 6 × 9 in (152 × 229 mm). It is the default book trim in the United States, used for paperback and hardback fiction and non-fiction, and the most widely supported print-on-demand size.
US Trade measures 152 millimetres wide and 229 millimetres tall.
US Trade Dimensions in Each Unit
US Trade is 152 × 229 mm, which is 15.2 × 22.9 cm or 5.98 × 9.02 in.
| Unit | Width | Height | Width × height | Copy |
|---|---|---|---|---|
| Millimetres (mm) | 152 | 229 | 152 × 229 mm | |
| Centimetres (cm) | 15.2 | 22.9 | 15.2 × 22.9 cm | |
| Metres (m) | 0.152 | 0.229 | 0.152 × 0.229 m | |
| Inches (in) | 5.98 | 9.02 | 5.98 × 9.02 in | |
| Feet (ft) | 0.5 | 0.75 | 0.5 × 0.75 ft | |
| Points (pt) | 431 | 649 | 431 × 649 pt | |
| Picas (pc) | 35.9 | 54.1 | 35.9 × 54.1 pc | |
| Pixels at 72 DPI | 431 | 649 | 431 × 649 px | |
| Pixels at 150 DPI | 898 | 1352 | 898 × 1352 px | |
| Pixels at 300 DPI | 1795 | 2705 | 1795 × 2705 px | |
| Pixels at 600 DPI | 3591 | 5409 | 3591 × 5409 px |
Pixel counts follow from the resolution: pixels = millimetres ÷ 25.4 × DPI. More on the DPI and pixels page.
US Trade Shape and Area
| Aspect ratio | 1 : 1.507 |
|---|---|
| Area | 0.0348 m² · 34,808 mm² |
| Diagonal | 274.9 mm · 10.82 in |
| Closest ISO size | 6 by 9 in, US default |
| Governing standard | Book trade convention (UK and US) |
US Trade to Scale
Put US Trade next to another size in the comparison tool.
Frequently Asked Questions
What size is a US Trade book?
US Trade is 6 by 9 inches, or about 152 by 229 mm.
Why is 6 by 9 the standard US book size?
It uses a standard press sheet with little waste, folds to a convenient page count, and fits retail shelving. Print-on-demand services default to it for the same economics.
Is 6 by 9 the same as Royal?
Nearly. Royal octavo is 156 by 234 mm, a few millimetres larger than 6 by 9 in on both sides.
Book Sizes
✓ Dimensions per Publishing trade size; unit values derived by formula. Reviewed . Editorial Process →