Cumberland Self-Seal Plain Envelope – 11B, 90 x 145mm, 80gsm White, Box of 500

You've got a batch of letters to post and the last thing you need is licking glue or fumbling with a stapler. These Cumberland self-seal envelopes close with one firm press. That's it.

11B size at 90 x 145mm, cut for standard A4 documents folded to fit. The 80gsm paper is thick enough that the contents don't show through, but light enough for bulk mailing without eating your postage budget.

A box of 500 means you're stocked for weeks of correspondence — invoices, letters, notices, whatever's landing on your desk this fortnight.

Add to cart and get back to what actually needs your attention

• Self-seal closure — no glue, no moisture, just press to seal
• 11B size (90 x 145mm) fits standard A4 documents folded to size
• 80gsm white paper for a clean, professional finish without show-through
• Box of 500 keeps your mailing station stocked for weeks
• Plain face ready for addressing, stamping, or labelling