Our set of 50 envelopes for invitations are made with quality kraft paper and are designed to give your party invitations a simple and customized design. The blank surface allows you to use stickers, pens, or glitter to customize your invites for an upcoming wedding, graduation party, bridal shower, baby shower, birthday party, or holiday. Each kraft square envelope measures 5.5 x 5.5 inches and with a self-adhesive clousure to ensure contents remain safely inside during transit.