Columbian CO730 6-1/2x9-1/2-Inch Catalog Self-Seal Brown Kraft Envelopes, 500 Count A durable ALL-PURPOSE mailing envelope. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. Convenient and secure self-sealing Self-Seal closure. Simply fold flap down and press for a quick seal. Heavy-duty 28lb opaque brown kraft material provides privacy of contents. Open end closure. 6-1/2" x 9-1/2" 500 envelopes