C7 vs JIS B7
| C7 | JIS B7 | |
|---|---|---|
| Millimetres | 81 × 114 | 91 × 128 |
| Inches | 3.19 × 4.49 | 3.58 × 5.04 |
| Centimetres | 8.1 × 11.4 | 9.1 × 12.8 |
| Aspect ratio | 1:1.41 | 1:1.41 |
| Area | 92.3 cm² | 116.5 cm² |
Which is bigger
C7 and JIS B7 carry the same number and are not the same sheet. The Japanese B series is defined by area — JIS B0 is 1.5 square metres where A0 is 1 — so a JIS B sheet is half again the area of the A sheet of the same number, and about 22% longer on each edge. The number tells you where a sheet sits in its own series and nothing about which standard it belongs to.
JIS B7, by 26.1% in area. JIS B7 is 10 mm wider than C7. JIS B7 is 14 mm taller.
Printing one on the other
A C7 page fits inside JIS B7 whole — print it at 100% and you get a 5 mm border down each side and 7 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| C7 artwork on JIS B7 paper | 112.3% | 0.1 × 0 mm margin |
| JIS B7 artwork on C7 paper | 89% | 0 × 0.1 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 C7 and JIS B7?
C7 is 81 × 114 mm and JIS B7 is 91 × 128 mm. JIS B7 is the larger of the two by 26.1% in area.
Can I print C7 on JIS B7?
Yes, at 100% — C7 is smaller on both edges, so it lands inside JIS B7 with a border all round.
Which is bigger, C7 or JIS B7?
JIS B7 — 91 × 128 mm against 81 × 114 mm, which is 26.1% more area.
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C7 in full · JIS B7 in full · All size comparisons · All paper sizes