C5 Paper Envelopes are made with high quality 120gsm paper with a peel and seal adhesive to seal the envelope. The envelopes are 162mm x 229mm. These envelopes can be printed using a laser printer. There are more coloured C5 envelopes to choose from. These colours include Red, White, Blue, Black, Pink, Purple. Our C5 Paper envelopes come in packs of 25, 50, & 100. Our envelopes are cheap in price but not in quality or durability.