A5 vs A10 Envelope (US)

Q: Which is bigger, A5 or A10 Envelope (US)?

A10 Envelope (US) — 152.4 × 241.3 mm against 148 × 210 mm, which is 18.3% more area.

	A5	A10 Envelope (US)
Millimetres	148 × 210	152.4 × 241.3
Inches	5.83 × 8.27	6 × 9.5
Centimetres	14.8 × 21	15.2 × 24.1
Aspect ratio	1:1.42	1:1.58
Area	310.8 cm²	367.7 cm²

Which is bigger

A10 Envelope (US), by 18.3% in area. A10 Envelope (US) is 4.4 mm wider than A5. A10 Envelope (US) is 31.3 mm taller.

Printing one on the other

A A5 page fits inside A10 Envelope (US) whole — print it at 100% and you get a 2.2 mm border down each side and 15.7 mm top and bottom.

You want	Set the print scale to	Leaves
A5 artwork on A10 Envelope (US) paper	103%	0 × 25.1 mm margin
A10 Envelope (US) artwork on A5 paper	87%	15.4 × 0 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: A5 is 1:1.42 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 25.1 mm of unwanted margin.

Frequently asked questions

What is the difference between A5 and A10 Envelope (US)?

A5 is 148 × 210 mm and A10 Envelope (US) is 152.4 × 241.3 mm. A10 Envelope (US) is the larger of the two by 18.3% in area.

Can I print A5 on A10 Envelope (US)?

Yes, at 100% — A5 is smaller on both edges, so it lands inside A10 Envelope (US) with a border all round.

Which is bigger, A5 or A10 Envelope (US)?

A10 Envelope (US) — 152.4 × 241.3 mm against 148 × 210 mm, which is 18.3% more area.

Related comparisons

A5 in full · A10 Envelope (US) in full · All size comparisons · All paper sizes