If you need extra envelopes for your invitations, we're here to help. These white triangular fold envelopes are designed to fit most white 8-1/2" x 5-1/2" wedding invitations. We strongly encourage you to have an extra set of envelopes available when you begin preparing your invitations or any mass mailing. Sold in packages of 25. Envelopes measure 8-11/16" x 5-3/4".