A10 Envelope (US) vs Envelope No. 12
| A10 Envelope (US) | Envelope No. 12 | |
|---|---|---|
| Millimetres | 152.4 × 241.3 | 120.65 × 279.4 |
| Inches | 6 × 9.5 | 4.75 × 11 |
| Centimetres | 15.2 × 24.1 | 12.1 × 27.9 |
| Aspect ratio | 1:1.58 | 1:2.32 |
| Area | 367.7 cm² | 337.1 cm² |
Which is bigger
A10 Envelope (US), by 9.1% in area. A10 Envelope (US) is 31.8 mm wider than Envelope No. 12. Envelope No. 12 is 38.1 mm taller.
Printing one on the other
Neither sheet fits inside the other at full size: A10 Envelope (US) is the wider of the two while Envelope No. 12 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 |
|---|---|---|
| A10 Envelope (US) artwork on Envelope No. 12 paper | 79.2% | 0 × 88.4 mm margin |
| Envelope No. 12 artwork on A10 Envelope (US) paper | 86.4% | 48.2 × 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: A10 Envelope (US) is 1:1.58 and Envelope No. 12 is 1:2.32. 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 88.4 mm of unwanted margin.
Frequently asked questions
What is the difference between A10 Envelope (US) and Envelope No. 12?
A10 Envelope (US) is 152.4 × 241.3 mm and Envelope No. 12 is 120.65 × 279.4 mm. A10 Envelope (US) is the larger of the two by 9.1% in area.
Can I print A10 Envelope (US) on Envelope No. 12?
Not at full size. Scale it to 79.2% and it fits inside Envelope No. 12 with 0 × 88.4 mm to spare.
Which is bigger, A10 Envelope (US) or Envelope No. 12?
A10 Envelope (US) — 152.4 × 241.3 mm against 120.65 × 279.4 mm, which is 9.1% more area.
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A10 Envelope (US) in full · Envelope No. 12 in full · All size comparisons · All paper sizes