These envelopes are made of 32 lb. metallic paper and and have a straight flap opening with a reliable gum closure to keep the items placed inside of them secure as they travel through the mail to their destinations. These envelopes are fabulous for sending out invitations to your wedding, holiday party or any other major event! Their metallic silver color will give any mailed items a dazzling, bright and elegant appearance.Details:Silver Stardream6" x 9.5" each32lb. paperStraight flap opening50 envelopes