B4 size
250 × 353 mm · 9.84 × 13.9 in · 708.7 × 1000.6 pt
Where it comes from
Half of B3: the B3 sheet's long side (500 mm) halves and rounds down to 250 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 | 709 × 1001 | legacy screens |
| 96 | 945 × 1334 | CSS reference |
| 150 | 1476 × 2085 | everyday print |
| 300 | 2953 × 4169 | quality print |
| 600 | 5906 × 8339 | fine art / line work |