These premium Member’s Mark Double Window Envelopes are excellent for securely mailing business invoices, professional forms, checks, and important paperwork. Double Windows The convenient double windows on the bottom and top left of each envelope display mailing and return addresses. Secure Self-Adhesive Seal Pull off the strip to reveal the envelope’s self-adhesive closure. No moisture is necessary. Privacy Tint Keeps your communications confidential. Window Dimensions and Placement Top window measures 7/8" x 3-1/2" Bottom window measures 1" x 4" Top window is placed 3/8" from edge and 2-1/4" from bottom Bottom window is placed 5/8" from edge and 5/8" from bottom