Blake Purely Everyday C5 162 x 229 mm 90 gsm Self Seal Wallet High Window Envelopes (1709) White Pack of 500

Amazon

Easy to use Self Seal closure High quality 90 gsm paper Perfect for business correspondance, letters, brochures and more High Window: 45 x 90mm, 72 up, 18 left

Zoro Tools

A vast array of white envelopes catering for every size. With gummed, self-seal, pocket and wallet varieties available.