C3 Cardboard Envelopes

C3 Cardboard Envelopes are perfect for those sending flat A3 sized items through the post. Our range of C3 cardboard envelopes include the highly presentable All Board Envelopes as well as lightweight Board Backed Envelopes depending on your needs, both of which offer excellent protection for a range of products. Both styles of envelope include a peel and seal adhesive strip closure which makes packing quick and easy and gives a secure and reliable seal so there’s no need for additional adhesives. All of our C3 cardboard envelopes are recyclable, biodegradable, and made from sustainable materials, and are supplied in boxes for neat storage and easy handling.

Please note: C3 sizing is 324 x 458mm, designed to fit A3 sized items of 297 x 420mm.