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What are standard commercial envelope measurements or sizes?

What are standard commercial envelope measurements or sizes?

Commercial business envelopes sizes are often referenced by a number such as #9 or #10. The chart below includes all of the most common types used by printers today.

Size

Width x Length

#6 1/4

3 1/2″ x 6″

#6 3/4

3 5/8″ x 6 1/2″

#7

3 3/4″ x 6 3/4″

#7 3/4

3 7/8″ x 7 1/2″

#8 5/8

3 5/8″ x 8 5/8″

#9

3 7/8″ x 8 7/8″

#10

4 1/8″ x 9 1/2″

#11

4 1/2″ x 10 3/8″

#12

4 3/4″ x 11″

#14

5″ x 11 1/2″

What are standard commercial envelope measurements or sizes?

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