Self Seal Envelopes
£11.94 inc. VAT each
Gummed Envelopes
£10.74 inc. VAT each
Folding Inserting Machine Envelopes
£10.74 inc. VAT each
Business envelopes in DL, C5 and C4
Everyday office and mailroom envelopes for letters, invoices, statements and documents. The range covers self-seal, gummed and folding-inserting-machine (FIM) envelopes in the standard business sizes - DL for A4 folded into thirds, C5 for A5 or A4 folded in half, and C4 for unfolded A4. White and manilla options are available, all UK-stocked and despatched the same working day before the daily cut-off, with VAT-exclusive pricing that falls as you buy more.
Choosing the right size and seal
Use DL for a standard letter or compliment slip, C5 for lightly folded A4 or A5 booklets, and C4 to send A4 flat. Self-seal is quickest for hand-packing; gummed suits lower-volume or longer-shelf-life mailing; FIM styles are made for automated inserting machines.
Windowed, plain and machine-ready
Plain and window options let you match your document layout, and machine-friendly styles keep high-volume runs moving. For heavier or protective posting, see padded envelopes & mailers.
Why order business envelopes from Parcelsend UK
- UK-stocked, same-working-day despatch before the daily cut-off
- Trade pricing that drops as your quantity increases
- Free UK delivery on orders over £100 (prices shown VAT-exclusive)
- DL, C5 and C4 in self-seal, gummed and machine-friendly styles
- Plain stock or branded with custom print
Key takeaways
- Standard business sizes: DL, C5 and C4, white or manilla.
- Pick the seal to match your process: self-seal, gummed or FIM.
- Related ranges: postage envelopes and personalised business envelopes.
Frequently Asked Questions
What size envelope do I need for A4?
What's the difference between self-seal and gummed envelopes?
Self-seal (peel-and-seal) envelopes close with a pull strip and are fastest for hand-packing. Gummed envelopes need moistening to seal and are often chosen for lower-volume or longer-shelf-life mailings.
Do you stock window envelopes?
Yes - window and plain options are available across the standard sizes so the address on your document shows through, saving you printing labels.
Are these suitable for franking or inserting machines?
Yes - folding-inserting-machine (FIM) and machine-friendly styles are made for automated inserting equipment and high-volume runs. Check the product page for machine compatibility.
Can I have envelopes printed with our logo?
Yes. Upload your artwork online and approve a free sample before production, roughly a 72-hour turnaround. See personalised business envelopes.
Do you offer bulk pricing on envelopes?
Yes - pricing is shown VAT-exclusive and falls as quantity rises, with free UK delivery over £100. Enter the quantity you need on the product page to see the price break.

