These black envelopes are made out of smooth, high quality paper. The size of these envelopes makes them ideal for standard sized, 5" x 7" invitations and greeting cards! Each one features a side straight flap and a reliable gum closure to keep items secure in transport. These envelopes feature a beautiful black color and a smooth finish, a combination that is certain to get them noticed by recipients. Use these envelopes to send invitations to weddings or formal events, to send congratulatory cards for accomplishments, to mail announcements, and more!Details:Smooth black5.25" x 7.25" (A7) size24 lb. (90 gsm)50 envelopesPaper