No. 9 Business Envelopes, (3 7/8 x 8 7/8), Security Tinted, Gum Flap, 24lb White, 500 per Box. Item#GF9NWT Standard No. 9 (3 7/8 x 8 7/8) 500 Envelopes per Box Security Tinted Gummed Flap 24lb White Paper