B6 vs Envelope No. 9

Q: Can I print B6 on Envelope No. 9?

Not at full size. Scale it to 78.7% and it fits inside Envelope No. 9 with 0 × 86.8 mm to spare.

Q: Which is bigger, B6 or Envelope No. 9?

Envelope No. 9 — 98.425 × 225.425 mm against 125 × 176 mm, which is 0.9% more area.

	B6	Envelope No. 9
Millimetres	125 × 176	98.425 × 225.425
Inches	4.92 × 6.93	3.88 × 8.88
Centimetres	12.5 × 17.6	9.8 × 22.5
Aspect ratio	1:1.41	1:2.29
Area	220 cm²	221.9 cm²

Which is bigger

Envelope No. 9, by 0.9% in area. B6 is 26.6 mm wider than Envelope No. 9. Envelope No. 9 is 49.4 mm taller.

Printing one on the other

Neither sheet fits inside the other at full size: B6 is the wider of the two while Envelope No. 9 is the taller, so each overruns the other on one edge. Whichever way you go, something has to scale or crop.

You want	Set the print scale to	Leaves
B6 artwork on Envelope No. 9 paper	78.7%	0 × 86.8 mm margin
Envelope No. 9 artwork on B6 paper	78.1%	48.2 × 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 Envelope No. 9 is 1:2.29. 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 86.8 mm of unwanted margin.

Frequently asked questions

What is the difference between B6 and Envelope No. 9?

B6 is 125 × 176 mm and Envelope No. 9 is 98.425 × 225.425 mm. Envelope No. 9 is the larger of the two by 0.9% in area.

Can I print B6 on Envelope No. 9?

Not at full size. Scale it to 78.7% and it fits inside Envelope No. 9 with 0 × 86.8 mm to spare.

Which is bigger, B6 or Envelope No. 9?

Envelope No. 9 — 98.425 × 225.425 mm against 125 × 176 mm, which is 0.9% more area.

Related comparisons

B6 in full · Envelope No. 9 in full · All size comparisons · All paper sizes