B6 vs A8 Envelope (US)

Q: Which is bigger, B6 or A8 Envelope (US)?

A8 Envelope (US) — 139.7 × 206.375 mm against 125 × 176 mm, which is 31% more area.

	B6	A8 Envelope (US)
Millimetres	125 × 176	139.7 × 206.375
Inches	4.92 × 6.93	5.5 × 8.13
Centimetres	12.5 × 17.6	14 × 20.6
Aspect ratio	1:1.41	1:1.48
Area	220 cm²	288.3 cm²

Which is bigger

A8 Envelope (US), by 31% in area. A8 Envelope (US) is 14.7 mm wider than B6. A8 Envelope (US) is 30.4 mm taller.

Printing one on the other

A B6 page fits inside A8 Envelope (US) whole — print it at 100% and you get a 7.3 mm border down each side and 15.2 mm top and bottom.

You want	Set the print scale to	Leaves
B6 artwork on A8 Envelope (US) paper	111.8%	0 × 9.7 mm margin
A8 Envelope (US) artwork on B6 paper	85.3%	5.9 × 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: B6 is 1:1.41 and A8 Envelope (US) is 1:1.48. 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 9.7 mm of unwanted margin.

Frequently asked questions

What is the difference between B6 and A8 Envelope (US)?

B6 is 125 × 176 mm and A8 Envelope (US) is 139.7 × 206.375 mm. A8 Envelope (US) is the larger of the two by 31% in area.

Can I print B6 on A8 Envelope (US)?

Yes, at 100% — B6 is smaller on both edges, so it lands inside A8 Envelope (US) with a border all round.

Which is bigger, B6 or A8 Envelope (US)?

A8 Envelope (US) — 139.7 × 206.375 mm against 125 × 176 mm, which is 31% more area.

Related comparisons

B6 in full · A8 Envelope (US) in full · All size comparisons · All paper sizes