This square-flap envelope is highly versatile, making it suitable for a wide range of uses-including party invitations, wedding announcements, holiday cards, general notices, Rsvp cards, thank-you notes, direct mail, standard correspondence, postcards, and photographs measuring 5 1/4"" x 5 1/4"". Its self-sealing design helps you save valuable time simply peel off the protective strip and press gently to seal. It is an ideal choice for business purposes, wedding announcements, or personal correspondence. The envelope is printable and compatible with home inkjet printers, as well as commercial-grade digital and offset printing equipment it ensures a smooth printing process free from ink smudging or paper jams. Crafted from linen-textured paper stock, the envelope features a thickness approximately double that of standard printer paper. Weight: 0.59 lbs.