Blake Purely Everyday C5 229 x 162 mm 80 gsm Pocket Self Seal Window Envelopes (11084) Manilla Pack of 500

Amazon

Easy to use Self Seal closure High Quality 80 gsm paper Perfect for business correspondance, letters, brochures and more Window: 45 x 100mm, 72 up, 15 left

Zoro Tools

Catering for all sizes in wallet, pocket, gummed and self-seal envelopes. A range of paper grades available, all with excellent environmental credentials.