Columbian #10 Envelopes, Gummed Seal, Executive Business, 4-1/8 x 9-1/2 Inches, White, 500 Per Box (CO125) 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 4-1/8" x 9-1/2"; 500 envelopes per box; made in USA