Columbian CO108 (#6-3/4) 3-5/8x6-1/2-Inch Security Tinted White Envelopes, 500 Count Envelope is ideal for all business, professional and personal correspondence. Security tinted for added privacy and confidentiality. Executive Style diagonal seam V-flap construction. Premium 24lb white wove stock. Moisture activated gummed seal. (#6-3/4) 3-5/8" x 6-1/2" 500 envelopes