3-7/8" x 8-7/8" ( 3.875" x 8.875" ), Regular Envelope, No Window, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Two Side Seams Under, 1-15/16" Wallet Flap Extended, Remoistening Seal, 500 Qty / Box, 2500 Qty / Ctn, 6.5 lbs. per Box