A4 size
210 × 297 mm · 8.27 × 11.69 in · 595.3 × 841.9 pt
Where it comes from
Half of A3: the A3 sheet's long side (420 mm) halves and rounds down to 210 mm — ISO 216's halve-and-floor rule.
Derived from the ISO 216 construction — no lookup required, only arithmetic.
Pixels at print resolutions
| DPI | Pixels (portrait) | Typical use |
|---|---|---|
| 72 | 595 × 842 | legacy screens |
| 96 | 794 × 1123 | CSS reference |
| 150 | 1240 × 1754 | everyday print |
| 300 | 2480 × 3508 | quality print |
| 600 | 4961 × 7016 | fine art / line work |