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Envelope Shapes and Sizes

There are many different sizes of envelopes, which can be used for any required applications, from promotional, personal or direct mail used for advertising and billing. The envelope shape and size as well as colour can have a influence on the attention it receives from end users and can make a considerable difference to response rate.
Envelope shapes are generally broken up into two categories . Wallet – opening on the long side and Pocket – opening on the short side. All envelopes have various options for sealing, based on the filling method required. Full gum (Lick & Sick) for automated inserting, Strip Seal ( Peal & Seal) and Self Seal for personalised inserting. Window and non window applications are available on most sizes.

Envelope size guide

Format Dimension (mm) Suitable for
DL 110 x 220 DL flyers (99 x 210 mm), A5 folded once, A4 folded into thirds
MDL 115 x 230/120 x 235 Mail out, fits more documents than a DL size
C6 114 x 162 A6, A5 folded one, A4 folded in half twice
C5 162 x 229 A5, A4 folded once
C4 229 x 324 A4 unfolded, A3 folded once
C3 324 x 458 A3 unfolded