Templates Compare
ISO A4 vs US Letter
A side-by-side comparison of ISO A4 and US Letter: dimensions, aspect ratios, and when each one is the right call.
ISO A4
US Letter
| ISO A4 | US Letter | |
|---|---|---|
| Size | 8.3 x 11.7 in | 8.5 x 11 in |
| Aspect | 0.71 | 0.77 |
| DPI | 300 | 300 |
| Color | CMYK | CMYK |
| Category | Paper & Print | Paper & Print |
| Scale note | about the size of a sheet of office paper | about the size of a sheet of office paper |
| Open | Start | Start |
Key differences
- Aspect ratios differ: ISO A4 is 0.71; US Letter is 0.77.