Columbian CO650 6-1/2x9-1/2-Inch Catalog Brown Kraft Envelopes, 500 Count A durable ALL-PURPOSE mailing envelope. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. Heavy-duty 28lb opaque brown kraft material provides privacy of contents. Open end closure. Moisture activated gummed seal. 6-1/2" x 9-1/2" 500 envelopes Recycled paper, contains 20% post-consumer waste Convenient size, 6.5 by 9.5 inches Includes 500 envelopes 28 lb media weight thickness Gummed closure