C9 size
C9: 4 × 5.7 cm. In inches this is about 1.575 × 2.244 in.
C9
C-series envelopes · Paper sizes
4 × 5.7 cm
Standard size (W × H)
Centimetres (cm)
4 × 5.7 cm
Millimetres (mm)
40 × 57 mm
Inches (in)
1.575 × 2.244 in
Area
22.8 cm²
Aspect ratio
1 : 1.4250
Width / height
40 / 57
Pixel size at different DPI
| DPI | Width (px) | Height (px) | Total pixels | Typical use |
|---|---|---|---|---|
| 72 DPI | 113 | 162 | 18,306 (0.0MP) | Screen display |
| 96 DPI | 151 | 215 | 32,465 (0.0MP) | Windows default |
| 150 DPI | 236 | 337 | 79,532 (0.1MP) | Standard print |
| 200 DPI | 315 | 449 | 141,435 (0.1MP) | Good print |
| 300 DPI | 472 | 673 | 317,656 (0.3MP) | High-quality print |
| 600 DPI | 945 | 1,346 | 1,271,970 (1.3MP) | Professional print |
C9 measures 4 × 5.7 cm (40 × 57 mm) and belongs to the C-series envelopes group. It is typically used for Envelopes and Cards and invitations.
C9 — C9 size
C9: 4 × 5.7 cm (40 × 57 mm). C-series envelopes.
In inches this is about 1.575 × 2.244 in. The footprint area is about 22.8 cm².
300 DPI: 472 × 673 px.
Common uses
C9 · FAQ
How big is C9?
C9: 4 × 5.7 cm (40 × 57 mm).
What is the area of C9?
The footprint area is about 22.8 cm².
Where is C9 used?
Typical uses include Envelopes, Cards and invitations, Mailings.
Tip: leave a small tolerance when printing or installing; allow 3 mm bleed on each side for print artwork.