Our guide on envelopes covers everything you need to know to decide the best envelope sizes for you, with C4 Envelopes, DL Envelopes, C3 Envelopes, C6 Envelopes and C5 Envelope sizes available in stock for next day delivery. As well as covering envelope sizes, our guide also informs you on different envelope formats too, helping you make sure your envelopes are fit for purpose. From window envelopes to Board Backed Envelopes and Padded Bags, our wide range of envelope formats ensure your mailings are delivered with the right impression and in the right condition.
ENVELOPE SIZES UK
From £2.30
C4 Envelopes
The popular choice for neatly sending unfolded sheets of A4 Paper
From £1.99
DL Envelopes
The most used envelope for business correspondence. Fold your A4 sheet into thirds for a perfect fit
From £5.90
C5 Envelopes
Best suited for unfolded A5 paper, or A4 folded in half
From £1.65
C6 Envelopes
Best suited for Informal mailings, fits an A4 sheet folded into quarters
From £33.70
C3 Envelopes
Specialised envelope for delivering unfolded A3 sheets of paper
So that’s size covered...
But what about style?
At Express 365, we don’t just offer envelopes in every size, we also make sure your envelope is fit for purpose too
ENVELOPE SIZES CHART
| Envelope Size | Dimensions (HxW) | Suitable for? |
|---|---|---|
| C4 Envelopes | 229 x 324 mm | Up to 5 sheets unfolded A4 paper |
| DL Envelopes | 100 x 220 mm | Up to 3 sheets folded A4 paper |
| C3 Envelopes | 324 x 458 mm | Up to 5 sheets unfolded A3 paper |
| C6 Envelopes | 114 x 162 mm | Up to 5 sheets folded A4 paper |
| C5 Envelopes | 162 x 229 mm | Up to 5 sheets folded A4 paper |
Need further assistance? Fill out our quick and easy form below...
