12" x 15-1/2" catalog envelopes feature a self-seal closure for mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. 28 lb. brown Kraft stock withstands extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 12" x 15-1/2" size accommodates standard-size or oversized documents without folding. Redi-Seal closure saves time and creates a secure, permanent seal.12" x 15-1/2" catalog envelopes feature a self-seal closure for mailing, storing and organizing. They are a must for keeping projects, files and mailings manageable. 28 lb. brown Kraft stock withstands extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 12" x 15-1/2" size accommodates standard-size or oversized documents without folding. Redi-Seal closure saves time and creates a secure, permanent seal.