Self Seal Envelopes
£11.94 inc. VAT each
Customised Printed Self Seal Envelopes
£65.34 inc. VAT each
C4 envelopes measure approximately 229×324mm - large enough to post a full A4 document completely flat, without folding. Parcelsend UK holds C4 envelopes in stock for same-day despatch, ideal for contracts, certificates, reports and anything you don't want creased in the post; see our full postage envelopes range for smaller formats too.
How to choose the right C4 envelope
C4 is the size to reach for whenever folding isn't an option - think legal documents, photographs, artwork proofs or multi-page reports that need to arrive uncreased.
Self-seal closure
Our C4 envelopes use a self-seal closure, so bulk mailing runs can be filled and sealed quickly without moistening gummed flaps.
Windowed and non-windowed options
Windowed C4 envelopes let a printed address show through the front page of your document, while non-windowed versions suit hand-addressed or labelled mail.
Why order C4 envelopes from Parcelsend UK
C4 stock is UK-held for same-day despatch before our daily cut-off, with volume pricing for businesses mailing documents regularly and free UK delivery over £100. For a mid-size alternative, see C5 envelopes.
Key takeaways
- C4 measures approximately 229×324mm
- Fits a full A4 sheet unfolded
- Self-seal closure, available windowed or non-windowed
- UK-stocked with same-day despatch before our daily cut-off
- Volume pricing and free UK delivery over £100
Frequently Asked Questions
What size is a C4 envelope?
C4 measures approximately 229×324mm, sized to take a full A4 sheet without any folding.
Why would I use C4 instead of C5 or DL?
C4 is the right choice whenever documents need to stay flat and uncreased, such as contracts or certificates - smaller sizes like C5 require at least one fold.
Do C4 envelopes have a window?
We stock both windowed and non-windowed C4 envelopes, so you can choose whichever suits your printing and addressing process.
What closure do C4 envelopes use?
Our C4 envelopes use a self-seal closure, which peels and sticks shut quickly and is well suited to bulk document mailing.
Can C4 envelopes be branded with my logo?
Yes - check our personalised envelopes collection, where you upload your artwork and we begin production once you've approved a free sample.
How quickly are C4 envelopes despatched?
C4 envelopes held as plain stock are despatched the same day when ordered before our daily cut-off, with free UK delivery over £100.
