C4 Black Peel and Seal 180gsm Window Envelope (324 x 229mm)

Elevate your mailings with our C4 (324x229 mm) black luxury Post Marque envelopes with a window, crafted from 180gsm premium paper for an eco-friendly solution. Featuring a peel and seal closure, these robust envelopes are ideal for artwork, invitations, and business mailings. Available in white for added elegance. Contact our team for Custom Printing options for these black C4 window envelopes.