Our shipping boxes have rigid sides built for storage and transport. Most feature flat, parallel, rectangular sides shaped like rectangular prisms. Boxes close with flaps, doors, or a separate lid for security. Some styles secure shut with catches, clasps, or locks.Multi-depth shipping box designs let one box adjust to several sizes. Each box includes a front panel space for writing content details. These boxes ship flat, saving space during freight and storage. A wide range of sizes suits any shipping need.