C3 size
324 × 458 mm · 12.76 × 18.03 in · 918.4 × 1298.3 pt
Where it comes from
Half of C2: the C2 sheet's long side (648 mm) halves and rounds down to 324 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 | 918 × 1298 | legacy screens |
| 96 | 1225 × 1731 | CSS reference |
| 150 | 1913 × 2705 | everyday print |
| 300 | 3827 × 5409 | quality print |
| 600 | 7654 × 10819 | fine art / line work |