Choosing the perfect sized envelope for you can be simple, as we have different sizes that will solve any mailing requirements for any requirement. We stock the four most popular envelope sizes: DL, C6, C5 and C4 envelopes that can be used for sending out business letter, cards and so much more.

DL Envelopes

DL envelopes are commonly used for sending out business letters and are designed to fit A4 paper that has been folded into thirds. The standard DL envelope measures 110 x 220mm, and they are ideal for remittance slips and letters.

C6 Envelopes

C6 are smaller, measuring at 114 x 162mm, and fit A4 paper that has been folded up in to quarters. They are ideal for sending out invitations, cards and flyers.

C5 Envelopes

C5 envelopes are the most commonly used envelope, measure at 162 x 229mm, which is designed to fit A4 paper that has been folded in half. C5 envelopes are commonly used for sending out letters and documents, larger invitations and cards, and newsletters.

C4 Envelopes

C4 envelopes are larger, measuring at 229 x 324mm, and can fit unfolded A4 paper within. These envelopes are commonly used for more important documents, certificates and brochure’s that can’t be folded.

Envelope Size Guide

Use the table below to see our whole range of envelope sizes, for a breakdown of all of their sizes in millimetres, centimetres and inches.