ISO 269 — C series (envelopes)
C4 size
229 × 324 mm
9.02 × 12.76 in · 22.9 × 32.4 cm
C4 measures 229 × 324 mm (22.9 × 32.4 cm; 9.02 × 12.76 in). At 300 DPI that is 2705 × 3827 pixels.
Millimetres
229 × 324 mm
Centimetres
22.9 × 32.4 cm
Inches
9.02 × 12.76 in
Points (pt)
649 × 918 pt
C4 in pixels
| DPI | Pixels (portrait) | Typical use |
|---|---|---|
| 72 | 649 × 918 | Legacy screen standard, PDF points |
| 96 | 866 × 1225 | Screens, CSS pixels |
| 150 | 1352 × 1913 | Everyday printing |
| 300 | 2705 × 3827 | Print quality |
Adjacent sizes
FAQ — C4
What size is C4 in centimetres?
C4 is 22.9 × 32.4 cm (229 × 324 mm) in portrait orientation.
How many pixels is C4?
It depends on the resolution: at 300 DPI (print) C4 is 2705 × 3827 pixels; at 96 DPI (screen) it is 866 × 1225 pixels.
What is C4 used for?
Envelope for a flat A4 sheet.