Shipping containers are held to very specific dimensional standards to ensure they can be safely stacked on top of, and below, any other shipping container in the world. Standard shipping containers are 8′ wide (2.44m), and are measured in TEU’s (twenty-foot equivalent units). Ocean cargo containers are held to a rigid standard to ensure that there are no issues during shipping.  Each intermodal shipping container (sometimes called “conex” containers) must be able to not only stack perfectly on a cargo ship, but also lock into chassis trailers safely and securely stack on rail cars.  The International Organization for Standardization (ISO) sets the standards for shipping container dimensions (via ISO 668).