JIS B5 vs A9 Envelope (US)
| JIS B5 | A9 Envelope (US) | |
|---|---|---|
| Millimetres | 182 × 257 | 146.05 × 222.25 |
| Inches | 7.17 × 10.12 | 5.75 × 8.75 |
| Centimetres | 18.2 × 25.7 | 14.6 × 22.2 |
| Aspect ratio | 1:1.41 | 1:1.52 |
| Area | 467.7 cm² | 324.6 cm² |
Which is bigger
JIS B5, by 44.1% in area. JIS B5 is 35.9 mm wider than A9 Envelope (US). JIS B5 is 34.8 mm taller.
Printing one on the other
A A9 Envelope (US) page fits inside JIS B5 whole — print it at 100% and you get a 18 mm border down each side and 17.4 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| JIS B5 artwork on A9 Envelope (US) paper | 80.2% | 0 × 16 mm margin |
| A9 Envelope (US) artwork on JIS B5 paper | 115.6% | 13.1 × 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: JIS B5 is 1:1.41 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 16 mm of unwanted margin.
Frequently asked questions
What is the difference between JIS B5 and A9 Envelope (US)?
JIS B5 is 182 × 257 mm and A9 Envelope (US) is 146.05 × 222.25 mm. JIS B5 is the larger of the two by 44.1% in area.
Can I print JIS B5 on A9 Envelope (US)?
Not at full size. Scale it to 80.2% and it fits inside A9 Envelope (US) with 0 × 16 mm to spare.
Which is bigger, JIS B5 or A9 Envelope (US)?
JIS B5 — 182 × 257 mm against 146.05 × 222.25 mm, which is 44.1% more area.
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JIS B5 in full · A9 Envelope (US) in full · All size comparisons · All paper sizes