Envelope No. 10 vs A9 Envelope (US)
| Envelope No. 10 | A9 Envelope (US) | |
|---|---|---|
| Millimetres | 104.775 × 241.3 | 146.05 × 222.25 |
| Inches | 4.13 × 9.5 | 5.75 × 8.75 |
| Centimetres | 10.5 × 24.1 | 14.6 × 22.2 |
| Aspect ratio | 1:2.3 | 1:1.52 |
| Area | 252.8 cm² | 324.6 cm² |
Which is bigger
A9 Envelope (US), by 28.4% in area. A9 Envelope (US) is 41.3 mm wider than Envelope No. 10. Envelope No. 10 is 19.1 mm taller.
Printing one on the other
Neither sheet fits inside the other at full size: A9 Envelope (US) is the wider of the two while Envelope No. 10 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 |
|---|---|---|
| Envelope No. 10 artwork on A9 Envelope (US) paper | 92.1% | 49.5 × 0 mm margin |
| A9 Envelope (US) artwork on Envelope No. 10 paper | 71.7% | 0 × 81.9 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 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 49.5 mm of unwanted margin.
Frequently asked questions
What is the difference between Envelope No. 10 and A9 Envelope (US)?
Envelope No. 10 is 104.775 × 241.3 mm and A9 Envelope (US) is 146.05 × 222.25 mm. A9 Envelope (US) is the larger of the two by 28.4% in area.
Can I print Envelope No. 10 on A9 Envelope (US)?
Not at full size. Scale it to 92.1% and it fits inside A9 Envelope (US) with 49.5 × 0 mm to spare.
Which is bigger, Envelope No. 10 or A9 Envelope (US)?
A9 Envelope (US) — 146.05 × 222.25 mm against 104.775 × 241.3 mm, which is 28.4% more area.
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Envelope No. 10 in full · A9 Envelope (US) in full · All size comparisons · All paper sizes