C4 paper size
229 × 324 mm
9.02 × 12.76 inches · 22.9 × 32.4 cm · aspect ratio 1:1.41
C4 in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 229 mm | 324 mm |
| Centimetres | 22.9 cm | 32.4 cm |
| Inches | 9.02 in | 12.76 in |
| Points (PostScript) | 649 pt | 918 pt |
C4 in pixels
Pixel dimensions depend entirely on the resolution you are working at — there is no single "pixel size" for a sheet of paper.
| Resolution | Pixels | Use |
|---|---|---|
| 72 DPI | 649 × 918 | Screen preview only — far too coarse to print |
| 150 DPI | 1352 × 1913 | Draft printing, internal documents |
| 300 DPI | 2705 × 3827 | The standard for commercial print |
| 600 DPI | 5409 × 7654 | Fine detail, line art, archival scanning |
Setting up a print document? Use 300 DPI and add 3 mm of bleed on every edge unless your printer specifies otherwise.
About C4
The envelope that takes an unfolded A4 sheet. The C series exists precisely so that C(n) holds A(n).
Other ISO C series sizes
| Size | Millimetres | Inches |
|---|---|---|
| C5 | 162 × 229 mm | 6.38 × 9.02 in |
| C6 | 114 × 162 mm | 4.49 × 6.38 in |
| DL | 110 × 220 mm | 4.33 × 8.66 in |
Frequently asked questions
What size is C4 in mm?
229 × 324 mm.
What size is C4 in inches?
9.02 × 12.76 inches.
What size is C4 in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 2705 × 3827 pixels; at 72 DPI it is only 649 × 918.