American Edwin Simpson developed a new sizing system in 1880 and it is still being used today. Simpson's system is based on a 1/3 inch difference between whole sizes and 1/6 inch difference in half sizes.
Read MoreThe British shoe sizing system was created by Edward II in 1324 and that sizing system is still used to manufacture footwear for the UK. The King's system is based on the size of a barleycorn.
Read MoreUnder the European (EU) shoe sizing system, shoe size is the length of the "last" - the length of the foot plus two centimeters - expressed in "Paris Points". The Paris Point is a unit of length equaling 2/3 of a centimeter or roughly 0.2625 inch.
Read MoreMondopoint is specified by ISO9407-1991 - Shoe Sizes, Mondopoint System of Sizing & Marking, and is in everyday use in Korea and for ice skates, ski boots and military footwear.
Read MoreJapanese shoe sizes are measured in centimetres for men, women and children, with half centimetre gaps between the sizes.
Read MoreAustralian shoe sizes were based on UK sizes and the mens sizes are still the same. Australian ladies shoe sizes are now different to the UK sizes with an Australian size being two sizes smaller than the equivalent UK size.
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