ISO 269 — C series (envelopes)
C3 size
324 × 458 mm
12.76 × 18.03 in · 32.4 × 45.8 cm
C3 measures 324 × 458 mm (32.4 × 45.8 cm; 12.76 × 18.03 in). At 300 DPI that is 3827 × 5409 pixels.
Millimetres
324 × 458 mm
Centimetres
32.4 × 45.8 cm
Inches
12.76 × 18.03 in
Points (pt)
918 × 1298 pt
C3 in pixels
| DPI | Pixels (portrait) | Typical use |
|---|---|---|
| 72 | 918 × 1298 | Legacy screen standard, PDF points |
| 96 | 1225 × 1731 | Screens, CSS pixels |
| 150 | 1913 × 2705 | Everyday printing |
| 300 | 3827 × 5409 | Print quality |
Adjacent sizes
FAQ — C3
What size is C3 in centimetres?
C3 is 32.4 × 45.8 cm (324 × 458 mm) in portrait orientation.
How many pixels is C3?
It depends on the resolution: at 300 DPI (print) C3 is 3827 × 5409 pixels; at 96 DPI (screen) it is 1225 × 1731 pixels.
What is C3 used for?
Envelope for a flat A3 sheet.