C6 vs A7 Envelope (US)
| C6 | A7 Envelope (US) | |
|---|---|---|
| Millimetres | 114 × 162 | 133.35 × 184.15 |
| Inches | 4.49 × 6.38 | 5.25 × 7.25 |
| Centimetres | 11.4 × 16.2 | 13.3 × 18.4 |
| Aspect ratio | 1:1.42 | 1:1.38 |
| Area | 184.7 cm² | 245.6 cm² |
Which is bigger
A7 Envelope (US), by 33% in area. A7 Envelope (US) is 19.3 mm wider than C6. A7 Envelope (US) is 22.2 mm taller.
Printing one on the other
A C6 page fits inside A7 Envelope (US) whole — print it at 100% and you get a 9.7 mm border down each side and 11.1 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| C6 artwork on A7 Envelope (US) paper | 113.7% | 3.8 × 0 mm margin |
| A7 Envelope (US) artwork on C6 paper | 85.5% | 0 × 4.6 mm margin |
These are the numbers for the "custom scale" box in a print dialog. "Fit to page" computes the same thing, but knowing the figure tells you in advance whether the result will look deliberate or accidental.
Why the shapes matter
The proportions differ: C6 is 1:1.42 and A7 Envelope (US) is 1:1.38. That difference is why a layout moved between them never quite lines up — scale it to fit one edge and the other is left with 3.8 mm of unwanted margin.
Frequently asked questions
What is the difference between C6 and A7 Envelope (US)?
C6 is 114 × 162 mm and A7 Envelope (US) is 133.35 × 184.15 mm. A7 Envelope (US) is the larger of the two by 33% in area.
Can I print C6 on A7 Envelope (US)?
Yes, at 100% — C6 is smaller on both edges, so it lands inside A7 Envelope (US) with a border all round.
Which is bigger, C6 or A7 Envelope (US)?
A7 Envelope (US) — 133.35 × 184.15 mm against 114 × 162 mm, which is 33% more area.
C6 in full · A7 Envelope (US) in full · All size comparisons · All paper sizes