Columbian #10 Self-Seal Security Tinted Envelopes, 4-1/8 x 9-1/2 Inch, White, 100 Per Box (CO284) Security tinted for added privacy and confidentiality; premium 24 lb. white wove stock Convenient and secure self-sealing self-seal closure; simply raise lower flap and press top flap down for a quick seal Envelope is ideal for all business, professional and personal correspondence; #10; 4-1/8 x 9-/2 inches; 100 envelopes per box