JAM Paper® Silver Stardream Metallic 4Bar A1 Invitation Envelopes measure 3 5/8 x 5 1/8 inches in size and are made out of high quality, 32lb metallic paper. This full carton contains a large and even total of 1000 envelopes. Each one of these envelopes features a straight flap opening and a reliable gum closure to keep the items placed inside of them secure as they travel through the mail. Certain to stand out and acquire the attention of all mail recipients, these envelopes feature a shining silver color and a metallic finish! These small envelopes are an excellent choice for Thank You cards, RSVP cards, Save-The-Dates, and more!