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. 28 lb. white wove stock withstands extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 6" x 9" size is perfect for folded documents or smaller items. Redi-Strip closure saves time and produces a secure, permanent seal. Simply peel off the strip and press for a quick seal.