Shoe sizes are based mainly on the length of theshoe.  In modern times, the length meant is the length inside the shoe the length of the last, the form on which the shoe is madenot the length ofthe sole. Obviously, the last length must be greater than the length of thefoot the shoe will contain.
 

The shoe sizing system has been found out by themeasuring the more than 10,000 people foot measurement as well as the bodyweight and propulsion of the person. English shoemakers apparently measuredcustomers' feet with a ruler marked in thirds.  When shoe sizes weresystematized, the one-third inch difference between whole sizes was retained,and size 0 was a length of 4 inches.  Sizes went from 1 to 13 for childrenand then from 1 to 13 again for adults. Half-sizes did not appear until late inthe ninetieth century.

A shoe size is an alphanumericalindication of the fitting size of a shoe for a person. Several differentshoe-size systems are still used today worldwide. In some regions, it is evencustomary to use different shoe-size systems for different types of shoes(e.g., men's, women's, children's, sport or safety shoes).

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Author is working as Faculty inFDDI, Fursatganj, Raebareli