Shipping container dimensions are held to very specific standards. ISO requires that all containers be built to within a few millimeters of one another so they can be stacked on container ships.

 

Containers are normally counted in TEU’s (Twenty-foot Equivalent Units) and are most commonly built in 20′ and 40′ lengths. There are also 40′ high cube containers, that are one foot taller than the standard 8’6″ container height.