JIS B7 vs Envelope No. 6 3/4

Q: Which is bigger, JIS B7 or Envelope No. 6 3/4?

Envelope No. 6 3/4 — 92.075 × 165.1 mm against 91 × 128 mm, which is 30.5% more area.

	JIS B7	Envelope No. 6 3/4
Millimetres	91 × 128	92.075 × 165.1
Inches	3.58 × 5.04	3.63 × 6.5
Centimetres	9.1 × 12.8	9.2 × 16.5
Aspect ratio	1:1.41	1:1.79
Area	116.5 cm²	152 cm²

Which is bigger

Envelope No. 6 3/4, by 30.5% in area. Envelope No. 6 3/4 is 1.1 mm wider than JIS B7. Envelope No. 6 3/4 is 37.1 mm taller.

Printing one on the other

A JIS B7 page fits inside Envelope No. 6 3/4 whole — print it at 100% and you get a 0.5 mm border down each side and 18.5 mm top and bottom.

You want	Set the print scale to	Leaves
JIS B7 artwork on Envelope No. 6 3/4 paper	101.2%	0 × 35.6 mm margin
Envelope No. 6 3/4 artwork on JIS B7 paper	77.5%	19.6 × 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 B7 is 1:1.41 and Envelope No. 6 3/4 is 1:1.79. 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 35.6 mm of unwanted margin.

Frequently asked questions

What is the difference between JIS B7 and Envelope No. 6 3/4?

JIS B7 is 91 × 128 mm and Envelope No. 6 3/4 is 92.075 × 165.1 mm. Envelope No. 6 3/4 is the larger of the two by 30.5% in area.

Can I print JIS B7 on Envelope No. 6 3/4?

Yes, at 100% — JIS B7 is smaller on both edges, so it lands inside Envelope No. 6 3/4 with a border all round.

Which is bigger, JIS B7 or Envelope No. 6 3/4?

Envelope No. 6 3/4 — 92.075 × 165.1 mm against 91 × 128 mm, which is 30.5% more area.

Related comparisons

JIS B7 in full · Envelope No. 6 3/4 in full · All size comparisons · All paper sizes