C6 vs A6 Envelope (US)

Q: Which is bigger, C6 or A6 Envelope (US)?

A6 Envelope (US) — 120.65 × 165.1 mm against 114 × 162 mm, which is 7.9% more area.

	C6	A6 Envelope (US)
Millimetres	114 × 162	120.65 × 165.1
Inches	4.49 × 6.38	4.75 × 6.5
Centimetres	11.4 × 16.2	12.1 × 16.5
Aspect ratio	1:1.42	1:1.37
Area	184.7 cm²	199.2 cm²

Which is bigger

A6 Envelope (US), by 7.9% in area. A6 Envelope (US) is 6.7 mm wider than C6. A6 Envelope (US) is 3.1 mm taller.

Printing one on the other

A C6 page fits inside A6 Envelope (US) whole — print it at 100% and you get a 3.3 mm border down each side and 1.5 mm top and bottom.

You want	Set the print scale to	Leaves
C6 artwork on A6 Envelope (US) paper	101.9%	4.5 × 0 mm margin
A6 Envelope (US) artwork on C6 paper	94.5%	0 × 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 A6 Envelope (US) is 1:1.37. 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 4.5 mm of unwanted margin.

Frequently asked questions

What is the difference between C6 and A6 Envelope (US)?

C6 is 114 × 162 mm and A6 Envelope (US) is 120.65 × 165.1 mm. A6 Envelope (US) is the larger of the two by 7.9% in area.

Can I print C6 on A6 Envelope (US)?

Yes, at 100% — C6 is smaller on both edges, so it lands inside A6 Envelope (US) with a border all round.

Which is bigger, C6 or A6 Envelope (US)?

A6 Envelope (US) — 120.65 × 165.1 mm against 114 × 162 mm, which is 7.9% more area.

Related comparisons

C6 in full · A6 Envelope (US) in full · All size comparisons · All paper sizes