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Envelope Size Guide

Our envelope size guide demonstrates the standard envelope sizes in the UK and the size of the paper they accomodate.

C4 Envelopes

C4 envelopes are 229 x 324mm in size and a A4 card blank can fit inside or an A3 card blank folded in half. These C4 envelopes are ideal for sending A4 documents or certificates.

C4 Envelope Size Guide C4 Envelope Size Guide

C5 Envelopes

C5 envelopes are 162 x 229mm in size and fit an A5 card blank or A4 card blank folded in half. These C5 envelopes are also known as A5 envelopes and are ideal for sending larger greetings cards.

C5 Envelope Size Guide C5 Envelope Size Guide C5 Envelopes Size

C6 Envelopes

C6 envelopes are 114 x 162mm in size and will fit an A5 card blank folded once or an A4 card blank folded four times. These C6 envelopes perfect for greetings cards or any occasion.

C6 Envelope Size Guide C6 Envelope Size Guide C6 Envelope Size Guide

DL Envelopes

Traditional sized DL envelopes are 110 x 220mm and fit an A4 card blank folded twice or an A5 card blank folded once. These DL envelopes are a popular sized envelope and are ideal for all occasions.

Dl Envelope Size Guide Dl Envelope Size Guide Dl Envelope Size Guide

Gummed Envelopes

Gummed envelopes require to be wetted with liquid in order to be stuck down. These are the traditional envelopes and are very popular.

Gummed Envelopes

Peel and Seal Envelopes

Peel and seal envelopes have a sticky flap underneath a paper strip that you peel off. Peel and seal envelopes make sealing the flap easier.

Peel and Seal Envelopes

Self Seal Envelopes

Self seal envelopes stick when they are pressed down without any need of wetting.

Self Seal Envelopes

Pocket Envelopes

Pocket envelopes have the flap on the short edge rather than the longer edge.

Pocket Envelopes