The product is a set of 100 white cardboard photo shipping flats mailers, each measuring 6.5" x 4.5". These unbranded/envelope-shaped mailers are manufactured in China and come with a manufacturer warranty. They are 100% recyclable, making them an environmentally friendly option for shipping materials. Perfect for businesses looking for a reliable and sustainable shipping solution, these mailers offer a secure and secure way to send photos and other small items.