11-1/2" x 14-1/2" catalog envelopes are made from heavyweight, 28 lb. white wove stock for home or office mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. Heavyweight envelopes withstand extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 11-1/2" x 14-1/2" size accommodates standard-size or oversized documents without folding. Pull-off, Redi-Strip closure saves time and makes a secure, permanent seal.