A9 vs JIS B10
| A9 | JIS B10 | |
|---|---|---|
| Millimetres | 37 × 52 | 32 × 45 |
| Inches | 1.46 × 2.05 | 1.26 × 1.77 |
| Centimetres | 3.7 × 5.2 | 3.2 × 4.5 |
| Aspect ratio | 1:1.41 | 1:1.41 |
| Area | 19.2 cm² | 14.4 cm² |
Which is bigger
A9, by 33.6% in area. A9 is 5 mm wider than JIS B10. A9 is 7 mm taller.
Printing one on the other
A JIS B10 page fits inside A9 whole — print it at 100% and you get a 2.5 mm border down each side and 3.5 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A9 artwork on JIS B10 paper | 86.5% | 0 × 0 mm margin |
| JIS B10 artwork on A9 paper | 115.6% | 0 × 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
Both sheets have the same 1:1.41 proportions, so artwork scales between them without any cropping or extra margin — only the size changes.
Frequently asked questions
What is the difference between A9 and JIS B10?
A9 is 37 × 52 mm and JIS B10 is 32 × 45 mm. A9 is the larger of the two by 33.6% in area.
Can I print A9 on JIS B10?
Not at full size. Scale it to 86.5% and it fits inside JIS B10 with 0 × 0 mm to spare.
Which is bigger, A9 or JIS B10?
A9 — 37 × 52 mm against 32 × 45 mm, which is 33.6% more area.
Related comparisons
A9 in full · JIS B10 in full · All size comparisons · All paper sizes