Please wait...

has been added to your cart

Continue shopping
View cart & checkout
Continue shopping
View cart & checkout

Envelope Size Guide

Handy Envelope Size Guide

Our handy envelope size guide below will help you to work out which standard size envelope you'll need, plus hopefully give you a good understanding of envelope sizing for the future. Why not DOWNLOAD & PRINT our handy envelope size guide too. Pop it on your pin board as an easy reference guide! CLICK HERE to open in a new window.

DL Envelope Size Guide:

DL envelope size guide - letter envelopes for A4

A standard DL envelope measures 110mm x 220mm. This is what most people consider a "letter envelope" and fits A4 paper folded into thirds. Business 'With Compliments' slips are designed to fit inside a DL envelope and usually measure 210mm x 99mm.

C3 Envelope Size Guide:

C3 Envelopes Size Guide A3

A standard C3 envelope measures 458mm x 324mm. This is designed to fit unfolded A3 paper (which is double the size of A4 paper). Standard A3 paper size is 297mm x 420mm.


C4 Envelope Size Guide:

C4 Envelopes Size Guide A4

A standard C4 envelope measures 324mm x 229mm. This is designed to fit unfolded A4 paper. Standard A4 paper size is 210mm x 297mm.

C5 Envelope Size Guide:

C5 Envelope Size Guide A5 Paper or Folded A4

A standard C5 envelope measures 162mm x 229mm. This is designed to fit A4 paper folded in half, or A5 paper unfolded. Standard A5 paper size is 148mm x 210mm.

C6 Envelope Size Guide:

C6 envelopes size guide A6 A5 A4

A standard C6 size envelope measures 114mm x 162mm. This is designed to fit A4 paper folded into quarters, A5 paper folded in half or A6 paper unfolded (often the size of a flyer). Standard A6 paper size is 105mm x 148mm.


C7 Envelope Size Guide:

C7 envelopes size guide A7 A6 A5

A standard C7 size envelope measures 84mm x 114mm. This is designed to fit A7 paper/cards, or A6 paper folded in half. Standard A7 paper size is 74mm x 105mm.


Why not DOWNLOAD & PRINT our handy envelope size guide? CLICK HERE to open in a new window

Figured out which size envelope you need? Head to our Shop by Size page to see the envelopes available.


Envelope Sizing FAQ's

Is there an easy way to work out which size envelope I need?

A quick and easy way to remember which envelope size you need is to swap the "A" letter of your paper size, for the letter "C". For example, if you want an envelope to fit an A5 paper, then you'd need a C5 envelope. 

What size envelope do I need for an A4 brochure?

An A4 paper or brochure (depending on the thickness of the brochure) will fit into a C4 size envelope, without having to hold the paper to fit.

What is a DL envelope?

A DL envelope is designed to fit an A4 piece of paper, folded into thirds. This is one of the most common envelope sizes for business letters and you will find the majority of your standard post arrives in a DL size envelope.



Envelope Sizes - Signed, Sealed and Delivered Your Way

Seal it your way with your choice of wallet envelopes or pocket envelopes that have the flap at the long or short edge. Whether you want to send photos, business letters, magazines, cards, invitations or literature; there are A4 and A5 envelopes to suit every occasion.

Post perfect with the right envelope sizes

Don’t pay more than you need to in postage by choosing the right envelope sizes for your needs. Whether you require business letters folded once or twice; there are C5, C6 and DL envelopes to suit your needs. You can find an envelope to keep your document intact with A5 or A4 envelopes.

Just some of the envelope sizes we stock include;

C4 Envelopes – A standard A4 envelope
C5 Envelopes – A standard A5 envelope
C6 Envelopes – An A5 envelope halved lengthways or an A4 envelope folded twice
DL Envelopes – A4 envelope folded twice so it's a third the size of an A4 sheet

Whether you need coloured envelopes, black envelopes or different sizes of envelopes; wholesale purchasing can be tailored to your personal or business requirements. Whether you are looking for C5, C6, DL or A4 envelopes; we have high quality coloured envelopes, business envelopes and wholesale envelopes in envelope sizes to suit your needs.