(Made In ) These 9x12 inch mailer bags are useful for many non-breakable items, such as small cosmetics in durable packaging, t-shirts, blankets, pants, books, and many other items. These shipping bags are durable with a sticky strip to tightly seal the mailer. In addition to being self-sealing for easy packing, the bags are also waterproof. The plastic mailing bag is thin, durable, and flexible, which allows for it to hold objects of varying shapes and sizes