PremierTeam C5 (229 mm x 162 mm) white envelopes suited for A5, or folded sheet of A4. Self seal, with window to see the address and security printed inside . PremierTeam quality, heavyweight 100gsm white envelopes to give you a professional look for every letter or mailing that you send. Envelope size C5 (229 mm x 162 mm , or 9 x 6 3/8) is perfect for A5, or for folded sheets of A4. A standard size window allows the recipient address to be displayed. The self seal flap has latex adhesive on both sides for a quick, easy and secure seal when pressed together. Packed in crush proof boxes for safe storage.