4-3/4" x 11" ( 4.75" x 11"), Regular Envelope, No Window, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Diagonal Seam, Flap Down, Remoistening Seal, 500 Qty / Box, 2500 Qty / Ctn, 11 lbs. per Box