Columbian CO330 6x9-Inch Booklet Grip-Seal White Envelopes, 250 Count A durable ALL-PURPOSE mailing envelope. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. Convenient and secure self-sealing Grip-Seal closure. Simply peel off release strip and press down for a quick, secure seal. Open side closure for easier insertion and retrieval of contents. 6" x 9" 250 envelopes