A durable ALL-PURPOSE mailing envelope. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. Features: 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. Sized: 9-1/2" x 12-1/2". Quantity = 250 envelopes.