Columbian #10 Security Tinted Envelopes, 4-1/8" x 9-1/2", White, 500 Per Box (CO128) Executive style diagonal seam V-flap construction; premium 24 lb. white wove stock; moisture activated gummed seal Envelope is ideal for all business, professional and personal correspondence; security tinted for added privacy and confidentiality 4-1/8" x 9-1/2"; 500 envelopes per box; made in USA