A7 vs JIS B7

Q: Which is bigger, A7 or JIS B7?

JIS B7 — 91 × 128 mm against 74 × 105 mm, which is 49.9% more area.

	A7	JIS B7
Millimetres	74 × 105	91 × 128
Inches	2.91 × 4.13	3.58 × 5.04
Centimetres	7.4 × 10.5	9.1 × 12.8
Aspect ratio	1:1.42	1:1.41
Area	77.7 cm²	116.5 cm²

Which is bigger

A7 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 49.9% in area. JIS B7 is 17 mm wider than A7. JIS B7 is 23 mm taller.

Printing one on the other

A A7 page fits inside JIS B7 whole — print it at 100% and you get a 8.5 mm border down each side and 11.5 mm top and bottom.

You want	Set the print scale to	Leaves
A7 artwork on JIS B7 paper	121.9%	0.8 × 0 mm margin
JIS B7 artwork on A7 paper	81.3%	0 × 0.9 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: A7 is 1:1.42 and JIS B7 is 1:1.41. 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 0.8 mm of unwanted margin.

Frequently asked questions

What is the difference between A7 and JIS B7?

A7 is 74 × 105 mm and JIS B7 is 91 × 128 mm. JIS B7 is the larger of the two by 49.9% in area.

Can I print A7 on JIS B7?

Yes, at 100% — A7 is smaller on both edges, so it lands inside JIS B7 with a border all round.

Which is bigger, A7 or JIS B7?

JIS B7 — 91 × 128 mm against 74 × 105 mm, which is 49.9% more area.

Related comparisons

A7 in full · JIS B7 in full · All size comparisons · All paper sizes