8.10 ISO Standard: Container Sizes
The International Organization for Standardization (ISO) sets the standard for shipping container sizes in addition to other practices. These standards can all be found on the ISO website.
Typically, containers are either 20’ or 40’ for general purposes but occasionally other sizes may be used such as the one outlined in red above. ISO 668:2020 outlines the classification, dimensions and ratings for series 1 freight containers.