4-1/8" x 9-1/2" ( 4.125" x 9.5" ), DG-1NT Double Poly Window Envelope, Top Window 7/8" x 3-1/4" Window, 5/8" From Left, 2-3/8" From Bottom; Bottom Window 1" x 4" Window, 5/8" From Left, 1" From Bottom, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Diagonal Seam, Flap Down, Remoistening Seal, 500 Qty / Box, 2500 Qty / Ctn, 7 lbs. per Box