4-3/4" x 6-1/2" ( 4.75" x 6.5" ), Machine Insertable Announcement Envelope, No Window, Western Sulphite, White Sulphite Paper, SFI Certified, Vellum Finish, Side Seam, Flap Down, Remoistening Seal, 1-3/4" ( 1.75" ) Rounded Flap, 500 Qty / Box, 2500 Qty / Ctn, 6.5 lbs. per Box