Columbian CO115  3-7/8x8-7/8-Inch White Envelopes, 500 Count (CO115) Envelope is ideal for all business, professional and personal correspondence. Executive Style diagonal seam V-flap construction. Premium 24lb white wove stock. Moisture activated gummed seal. (#9) 3-7/8" x 8-7/8" 500 envelopes