6-1/2" x 9-1/2" catalog envelopes feature a gummed flap and heavyweight, 28 lb. brown Kraft stock to manage home or office mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. Sturdy, 28 lb. Kraft stock withstands extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 6-1/2" x 9-1/2" size is ideal for folded or smaller documents. Fully gummed flap provides a secure, permanent seal.