PremierTeam C5 (229 mm x 162 mm) white envelopes suited for A5, or folded sheet of A4. Self seal, plain envelopes with security printing 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. These envelopes are plain white, with security pattern interior so the contents cannot be seen through the envelope. 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.