There are many styles and sizes of envelope, so please read below for more information about the most popular ones. If you need more specific information, perhaps about a style or size not mentioned here, please contact us.

Envelope Styles

The 3 most common styles of envelope are,

envelope styles

For each of the above styles, they can be,

They are available in many different colours but the most common are,

For sealing the envelopes, the flaps can be,

The standard envelopes are quite flat, allowing just a few sheets of paper, but it is also possible to get them with a gusset thus allowing more bulky items to be sent. These tend to be stronger than the standard ones.

Envelope Sizes

As with paper, envelopes have an international standard known as the 'C' series. These are designed to take paper sizes according to the 'A' series. For example, a C4 envelope is designed to take an unfolded sheet of A4 paper, and similarly a C5 envelope will take an unfolded A5 sheet of paper. Please see the table below for all the details.

Table of Sizes

Size W x H (mm) W x H (inches) Paper Size
DL 110 x 220 4.33 x 8.66 A4 folded into 3 (2 folds)
C3 324 x 457 12.75 x 18.0 A3 unfolded
C4 229 x 324 9.0 x 12.75 A4 unfolded
C5 162 x 229 6.37 x 9.0 A5 unfolded
A4 folded into 2 (1 fold)
C6 114 x 162 4.5 x 6.37 A5 folded into 2 (1 fold)
A4 folded into 3 (2 folds)
C7 81 x 114 3.2 x 4.5 A5 folded into 3 (2 folds)



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