Our C5 Metallic Envelopes are made with high quality 120gsm paper with a peel and seal adhesive to seal the envelope. The envelopes are 162mm x 229mm and will fit an A4 sheet folded in half. These envelopes can be printed using a laser printer. Our Metallic paper envelopes come in packs of 25, 50 & 100. Our envelopes are cheap in price but not in quality or durability.