The UPS Store, Uline and Walmart sell shipping boxes of various sizes. The UPS Store and Walmart also offer shipping boxes for sale in their brick and mortar stores.
The UPS Store sells various standard-sized shipping boxes online, as well as boxes for odd-shaped items, such as golf bags and surf boards. In-store box options vary by location. Uline provides shipping boxes primarily for businesses and offers an extensive online catalog. Available items include bulk cargo, easy-fold mailers, side loaders and insulated shippers. Walmart sells shipping boxes for general and industrial mailing on its website. Users can check store availability of products by entering a location for their nearest Walmart store.