2-1/16" x 3-1/2" ( 2.0625" x 3.5" ), Open Side Drug Envelope, No Window, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Diagonal Seam, Flap Down, Remoistening Seal, 1000 Qty / Box, 10000 Qty / Ctn, 3 lbs. per Box