6″ x 9″ catalog envelopes feature a self-seal closure and are an excellent solution for mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. Redi-Seal closure saves time and makes a secure, permanent seal. Simply press to seal – no moisture needed or pull-off strips to throw away. 28 lb. brown Kraft stock withstands extensive handling and mailing. Contents are protected during use to give you assurance that they arrive unharmed. 6″ x 9″ size accommodates an 8-1/2″ x 11″ folded sheet or smaller, unfolded documents.