7-1/2" x 7-1/2" ( 7.5" x 7.5" ), Square Envelope, No Window, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Side Seam, Flap Down, Remoistening Seal, 1-7/8" ( 1.875" ) Square Flap, 500 Qty / Box, 500 Qty / Ctn, 14 lbs. per Box