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Set of 100 white envelopes in DL format, which have a self-adhesive adhesive edge on the back flap to close the envelope. The size of the envelope is 11 by 22 cm. If you close the envelope with the self-adhesive adhesive edge, it is wise to leave it alone for a while and wait 10 minutes so that the paper can absorb the glue properly. This way you reduce the chance that the envelope will pop open later.