Envelopes

100 Pack C4 - 233 x 333 mm Cardboard Envelopes - Expandable, Peel & Seal Letter Envelopes - Royal Mail Large Letter Posting (PIP) Made from 100% recycled material Lite One Efficient solution to PiP boxes Biodegradable and compostable once glue strip is removed. The C4L expandable envelope is perfect for paperwork, and medium package items such as t-shirts and other items. The... 100 Pack C4 - 233 x 333 mm Cardboard Envelopes - Expandable, Peel & Seal Letter Envelopes - Royal Mail Large Letter Posting (PIP)