C4 size
229 × 324 mm · 9.02 × 12.76 in · 649.1 × 918.4 pt
Where it comes from
Half of C3: the C3 sheet's long side (458 mm) halves and rounds down to 229 mm — ISO 216's halve-and-floor rule.
Source: Markus Kuhn — International standard paper sizes (CC BY 4.0)
Pixels at print resolutions
| DPI | Pixels (portrait) | Typical use |
|---|---|---|
| 72 | 649 × 918 | legacy screens |
| 96 | 866 × 1225 | CSS reference |
| 150 | 1352 × 1913 | everyday print |
| 300 | 2705 × 3827 | quality print |
| 600 | 5409 × 7654 | fine art / line work |