The purpose of an envelope is to protect the contents and deliver them safely
in good condition. By selecting the correct size envelope, you give better protection
to the contents and improve the appearance by reducing folding and creasing.
Also, for easier and quicker insertion to save time. The DL and C6 are suitable
for mechanical sorting.
The full lists of ISO envelopes sizes is shown and are all with the International
Postal agreements. All are from the B or C sheet sizes with the exception of
designated DL (DIN Lang).
C3 324 x 458 mm
B4 250 x 353 mm
C4 229 x 324 mm
B5 176 x 250 mm
C5 162 x 229 mm
B6/C4 125 x 324 mm
B6 125 x 176 mm
C6 114 x 162 mm
DL 110 x 220 mm
C7/6 81 x 162 mm
C7 81 x 114 mm
