C6 White Cardboard Envelopes

C6 White Cardboard Envelopes are perfectly sized for sending A6 documents and items in a neat and presentable fashion. These white cardboard envelopes are designed with a rigid back board and strong paper front to keep your items safe while also keeping weight and postage costs low. Their peel and seal adhesive strip provides a secure closure and prevents the need for any extra tape. Our C6 white cardboard envelopes conform to the Royal Mail size regulations for letters.