The Mondo­point shoe­size­system is
the only one that was defined in accordance to ISO standard (ISO 9407) in 1991. This distinguishes the MP system from the
other three major shoe size systems (EU, UK, US), which, as described above, are not yet subject to an international standard
but to a so-called pre-standard. While in these systems, the reference size for a shoe size is sometimes the foot length, or
sometimes the interior length. In the Mondopoint shoe size system, the foot length in centimetres or millimetres is strictly
used as the reference size for calculating the shoe size. Mondopoint shoe sizes simply correspond to the foot length in
millimetres, whereby a subdivision of the shoe sizes in 5-mm steps has become established.
Especially in Russia, China, Japan and Southeast Asia, the indication of shoe sizes in centimetres or millimetres is
well established. This simple system for shoe sizes has also become established for military shoes, safety shoes
or ski shoes.