Columbian Envelopes No.10 Envelopes, Self-Seal, Security Tinted, 4-1/8 x 9-1/2 Inches, 2-Pack (73395) Premium 24 lb. white wove stock; #10; 4-1/8 x 9-/2 inches; 100 envelopes per box, 2 boxes per pack Convenient and secure self-sealing self-seal closure; simply raise lower flap and press top flap down for a quick seal Security tinted for added privacy and confidentiality; envelope is ideal for all business, professional and personal correspondence