C7 Envelope Size
C7 measures 81 × 114 mm (3.19 × 4.49 in). The C series is used for envelopes.
| Millimetres | 81 × 114 mm |
|---|---|
| Centimetres | 8.1 × 11.4 cm |
| Inches | 3.19 × 4.49 in |
| Aspect ratio (long ÷ short) | 1.407 |
| Series | ISO 269 C series (envelopes) |
| Fits | An A7 sheet laid flat fits inside a C7 envelope |
| Fits inside | A C7 envelope fits inside a B7 envelope |
Where you will see C7
C7 holds A7 sheets and small cards, and is used for small invitations and notes.
How C7 relates to A and B sizes
In the ISO 269 C series, each C size is slightly larger than the A size with the same number (74 × 105 mm for A7), so a flat A7 sheet fits inside a C7 envelope. The C7 envelope in turn fits inside a B7 envelope (88 × 125 mm).
Frequently asked questions
What size is a C7 envelope?
A C7 envelope is 81 × 114 mm (3.19 × 4.49 inches).
What fits in a C7 envelope?
A flat A7 sheet (74 × 105 mm) fits in a C7 envelope with a small margin of 7 mm in width and 9 mm in height.
Related
- C6 Envelope Size114 × 162 mm
- C8 Envelope Size57 × 81 mm
- A7 Paper Size74 × 105 mm
- B7 Paper Size88 × 125 mm
Last updated: 2026-10-03