Envelope No. 10 vs A10 Envelope (US)

Q: Which is bigger, Envelope No. 10 or A10 Envelope (US)?

A10 Envelope (US) — 152.4 × 241.3 mm against 104.775 × 241.3 mm, which is 45.5% more area.

	Envelope No. 10	A10 Envelope (US)
Millimetres	104.775 × 241.3	152.4 × 241.3
Inches	4.13 × 9.5	6 × 9.5
Centimetres	10.5 × 24.1	15.2 × 24.1
Aspect ratio	1:2.3	1:1.58
Area	252.8 cm²	367.7 cm²

Which is bigger

A10 Envelope (US), by 45.5% in area. A10 Envelope (US) is 47.6 mm wider than Envelope No. 10. Both are exactly 241.3 mm tall.

Printing one on the other

A Envelope No. 10 page fits inside A10 Envelope (US) whole — print it at 100% and you get a 23.8 mm border down each side and 0 mm top and bottom.

You want	Set the print scale to	Leaves
Envelope No. 10 artwork on A10 Envelope (US) paper	100%	47.6 × 0 mm margin
A10 Envelope (US) artwork on Envelope No. 10 paper	68.8%	0 × 75.4 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: Envelope No. 10 is 1:2.3 and A10 Envelope (US) is 1:1.58. 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 47.6 mm of unwanted margin.

Frequently asked questions

What is the difference between Envelope No. 10 and A10 Envelope (US)?

Envelope No. 10 is 104.775 × 241.3 mm and A10 Envelope (US) is 152.4 × 241.3 mm. A10 Envelope (US) is the larger of the two by 45.5% in area.

Can I print Envelope No. 10 on A10 Envelope (US)?

Yes, at 100% — Envelope No. 10 is smaller on both edges, so it lands inside A10 Envelope (US) with a border all round.

Which is bigger, Envelope No. 10 or A10 Envelope (US)?

A10 Envelope (US) — 152.4 × 241.3 mm against 104.775 × 241.3 mm, which is 45.5% more area.

Related comparisons

Envelope No. 10 in full · A10 Envelope (US) in full · All size comparisons · All paper sizes