Paper size chart
| Size | Millimeters | Inches | Pixels at 300 DPI |
|---|---|---|---|
| A0 | 841 × 1189 mm | 33.11 × 46.81 in | 9933 × 14043 |
| A1 | 594 × 841 mm | 23.39 × 33.11 in | 7016 × 9933 |
| A2 | 420 × 594 mm | 16.54 × 23.39 in | 4961 × 7016 |
| A3 | 297 × 420 mm | 11.69 × 16.54 in | 3508 × 4961 |
| A4 | 210 × 297 mm | 8.27 × 11.69 in | 2480 × 3508 |
| A5 | 148 × 210 mm | 5.83 × 8.27 in | 1748 × 2480 |
| A6 | 105 × 148 mm | 4.13 × 5.83 in | 1240 × 1748 |
| US Letter | 215.9 × 279.4 mm | 8.5 × 11 in | 2550 × 3300 |
| US Legal | 215.9 × 355.6 mm | 8.5 × 14 in | 2550 × 4200 |
| Tabloid (Ledger) | 279.4 × 431.8 mm | 11 × 17 in | 3300 × 5100 |
How A-series sizes work
ISO 216 A-sizes keep the same 1:√2 aspect ratio, so each size is exactly half the one above it: fold A3 in half and you get A4. A0 has an area of one square meter. That makes scaling artwork between A-sizes simple: A4 to A3 is about 141%, and A4 to A5 is about 71%.
The US and Canada use Letter, Legal and Tabloid instead. They have different proportions, so a layout built for A4 needs adjusting (not just scaling) to fit Letter without awkward margins.
Setting up files for print
- Add bleed (usually 3 mm or 0.125 in per side) if the design runs to the edge of the page.
- Keep important text inside a safe margin of about 3–6 mm from the trim.
- Build artwork at 300 DPI at final size; the pixel column above gives the exact canvas size.