From the Wikiversity tutorial:
This learning project is about chain mail. It is also called chain maille, or simply mail or maille. Armor, jewelry, sculptures, clothing and more can be made with chain mail. The construction of these items has many things in common, such as how to make rings, how to close them, and assembly patterns, known as weaves. Differences will be in the material used, the size and gauge of the rings, and shape that is built with the rings.