These envelopes are made out of high quality, metallic paper. Each one of these envelopes features a flawlessly square shape! To keep the items placed inside of these envelops secure as they are carried through the mail, each one has straight flap opening with a reliable gum closure. These envelopes feature a shining color and a metallic finish! Their cheerful, eye-catching appearance makes them fantastic for special occasion related mailing purposes.Details:Available in multiple colors6" x 6"32 lb. (120 gsm)50 envelopesPaper with metallic finish