The 200 Pack KKBESTPACK Poly Mailers are large shipping envelopes measuring 14.5″ x 19″ in size, perfect for securely sending and receiving documents, merchandise, and other items. Made by the brand KKBESTPACK, these white envelopes are durable and reliable for everyday use. With a generous quantity of 200 packs, these poly mailers are an essential tool for businesses and individuals needing to ship and package items quickly and efficiently.