Choosing the Right Envelope

Envelopes come in a variety of sizes to most standard paper sizes. The most commonly used sizes are:

DL 110 x 220mm C6 114 x 162mm
DLX 120 x 235mm C5 162 x 229mm
11B 90 x 145mm C4 229 x 324mm
12 3/4 92 x 165mm C3 324 x 458mm


Envelopes Types

The envelope you design or choose is just as important as the contents inside. There are many factors to consider when making your selection; the size of the contents, whether automated equipment is required for the content insertion, addressing requirements and the budget. Understanding the basic functions of each envelope will help you make the right decision.


Plain Face
Front of envelope is plain with no window panel. Used for light weight correspondence. Suitable for hand inserted and addressed documents.

Window Face
Front of envelope includes a window panel. Used for light weight correspondence. No labelling required. Suitable for documents that have been pre-addressed.

Envelope with a near rectangular flap along the short edge. Small Pockets are used for general correspondence. Large Pockets are used when extra strength is required for contents such as magazines, catalogues, annual reports and legal documents.

Envelope with a near rectangular flap along the longer edge. Small Wallets are used for lightweight correspondence. Large Wallets/Booklet Mailers are used for booklets, small catalogues and commercial documents.

Envelope with a triangular flap along the longer edge. Used for lightweight correspondence, commercial documents and direct mail. Generally suitable for machine insertion.

Envelopes Styles


Pre-gummed flaps for quick and convenient closure. No moisture required.

Moist Seal/Lick and Stick
Requires moisture to close. Ideal for large jobs and generally used for machine insertion of items.

Peel-n-Seal/Strip Seal
Simply peel back strip and seal. No moisture or licking required. Designed for hand insertion. Stronger seal and longer shelf life.

No Seal
Envelope flaps with no adhesive properties, no seal at all. Mainly used in Xray industry, and for interoffice use.

Secretive pattern printed on the inside of the envelope. Protects your private letters and documents.