A5 vs A9 Envelope (US)

Q: Can I print A5 on A9 Envelope (US)?

Not at full size. Scale it to 98.7% and it fits inside A9 Envelope (US) with 0 × 15 mm to spare.

Q: Which is bigger, A5 or A9 Envelope (US)?

A9 Envelope (US) — 146.05 × 222.25 mm against 148 × 210 mm, which is 4.4% more area.

	A5	A9 Envelope (US)
Millimetres	148 × 210	146.05 × 222.25
Inches	5.83 × 8.27	5.75 × 8.75
Centimetres	14.8 × 21	14.6 × 22.2
Aspect ratio	1:1.42	1:1.52
Area	310.8 cm²	324.6 cm²

Which is bigger

A9 Envelope (US), by 4.4% in area. A5 is 1.9 mm wider than A9 Envelope (US). A9 Envelope (US) is 12.2 mm taller.

Printing one on the other

Neither sheet fits inside the other at full size: A5 is the wider of the two while A9 Envelope (US) is the taller, so each overruns the other on one edge. Whichever way you go, something has to scale or crop.

You want	Set the print scale to	Leaves
A5 artwork on A9 Envelope (US) paper	98.7%	0 × 15 mm margin
A9 Envelope (US) artwork on A5 paper	94.5%	10 × 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 A9 Envelope (US) is 1:1.52. 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 15 mm of unwanted margin.

Frequently asked questions

What is the difference between A5 and A9 Envelope (US)?

A5 is 148 × 210 mm and A9 Envelope (US) is 146.05 × 222.25 mm. A9 Envelope (US) is the larger of the two by 4.4% in area.

Can I print A5 on A9 Envelope (US)?

Not at full size. Scale it to 98.7% and it fits inside A9 Envelope (US) with 0 × 15 mm to spare.

Which is bigger, A5 or A9 Envelope (US)?

A9 Envelope (US) — 146.05 × 222.25 mm against 148 × 210 mm, which is 4.4% more area.

Related comparisons

A5 in full · A9 Envelope (US) in full · All size comparisons · All paper sizes