Blake Purely Everyday 155 x mm 100 gsm Square Peel & Seal Envelopes (0155PS) White Pack of 500

Amazon

Secure Peel and Seal Closure for ease of use, added security and extra shelf life High quality 100 gsm paper Perfect for invitations, greetings cards and more Peel and Seal Suitable for brochures, catalogues etc. High quality paper

Zoro Tools

A square envelope always enhances a mailing and with the largest range available in Europe, this gives infinite opportunities for provocative direct mail.