Frequently Asked Questions

What are the most common business envelope sizes?

Envelopes are available in many different sizes. Each size is referred to by a number. The most common ones are listed below.

#6 1/4 SIZE: 3 1/2" x 6"

#6 3/4 SIZE: 3 5/8 x 6 1/2"

#7 SIZE: 3 3/4" x 6 3/4"

#7 3/4 SIZE: 3 7/8" x 7 1/2"

#8 5/8 SIZE: 3 5/8" x 8 5/8"

#9 SIZE: 3 7/8" x 8 7/8"

#10 SIZE: 4 1/8" x 9 1/2"

#11 SIZE: 4 1/2" x 10 3/8"

#12 SIZE: 4 3/4" x 11"

#14 SIZE: 5" x 11 1/2"