Mail magazines, brochures or photos in these Box Partners self-seal flat mailers. Theexteriors provide a perfect background for custom corporate labels and shipping tags, while the convenient peel and seal adhesive closures prevent items from slipping out of each envelope. With lightweight, durable construction, these Box Partners self-seal flat mailers protect your fragile items during the shipping process. Overall mailer dimensions: 9"W x 11. 5"L. Peel and seal closure with convenient pull tab tear strip for easy opening. Lightweight mailers manufactured fromchipboard help to reduce postal costs. Comes in a carton of 25 mailers. Protect photos and documents during shipping without the need for additional stiffeners. No additional stiffeners needed. Package reading materials and other goods in these Box Partners 9 x 11. 5-inchself-seal flat mailers.