5-3/4" x 9-1/4" ( 5.75" x 9.25" ), Std. W-2/Printed Laser Forms Double Poly Window Envelope, Top Window 7/8" x 4-1/4" Window, 3/8" From Left, 3-9/16" From Bottom; Bottom Window 1-5/16" x 4-1/4" Window, 3/8" From Left, 1-3/4" From Bottom, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Side Seam, Flap Down, Remoistening Seal, Blue Wesco Tint, 500 Qty / Box, 2500 Qty / Ctn, 9 lbs. per Box