Description
Our A4 rigid envelope is a C4 white all-board mailer, 324 x 229mm, the standard size for unfolded A4. The 350gsm coated board keeps documents flat, it closes with a peel-and-seal strip and opens with a tear strip. Pack of 20.
All-board envelopes are stiff on both sides, so they protect better than board-backed envelopes with a paper front.
A4 rigid envelope: specifications
| Size | 324 x 229mm (12.75 x 9in), C4 |
|---|---|
| Fits | Unfolded A4 documents (210 x 297mm) |
| Board | 350gsm white coated chipboard |
| Closure | Peel-and-seal strip, 45mm lip |
| Opening | Tear strip |
| Tolerance | ±2mm |
| Pack quantity | 20 |
| Royal Mail | Royal Mail Large Letter when the packed item is no thicker than 25mm and weighs no more than 750g (limits 353 x 250 x 25mm) |
Good for: Certificates, prints, photos, brochures, catalogues and magazines that must not bend.
Which cardboard envelope do I need?
Match the envelope to your largest flat item. Options in stock:
- A5 cardboard envelope: C5 162 x 229mm, white all-board, fits A5
- A4 cardboard envelope: 248 x 330mm, white all-board, A4 plus a backing card
- Do not bend envelope A4: C4 board-backed, manilla front, lighter to post
See every size in all-board and board-backed envelopes. These sizes can post as a Royal Mail Large Letter if the packed envelope is no thicker than 25mm and weighs 750g or less.
Buying for a business, school or production?
We supply print shops, photographers, schools, universities, theatres and online sellers. If you post documents regularly, contact us to ask about trade pricing.
A4 rigid envelope FAQs
Will an A4 sheet fit?
Yes. C4 (324 x 229mm) is the standard envelope for unfolded A4. For A4 plus a backing card, choose the 248 x 330mm envelope.
Can I post it as a Large Letter?
Yes, provided the packed envelope is no thicker than 25mm and weighs no more than 750g.
How does the recipient open it?
Pull the tear strip across the top.
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