9-1/2" x 12-1/2" catalog envelopes feature a self-seal closure and heavyweight, 28 lb. brown Kraft stock for mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. 28 lb. stock withstands extensive handling and mailing. Contents are protected during use to give you assurance that they arrive unharmed. 9-1/2" x 12-1/2" size accommodates standard-size documents without folding. Redi-Seal closure saves time and makes a secure, permanent seal.