The q connect white c5 self seal envelopes are made of crisp quality paper and feature a easy seal self adhesive flap just insert your letter fold the flap open and press down to seal theres no gum and no licking required these c5 envelopes are designed for unfolded a5 documents or folded a4 documents plain white envelopes made of sturdy 100gsm paper self adhesive flap pack of 500 envelopes format c5 229 x 162 mm