, Alabama (PressExposure) April 10, 2009 -- There are several different shoe-size systems that are used worldwide. These systems differ in what they measure, what unit of measurement they use.
There are characteristics that that refer to shoe length. For example, the average width of foot for which a shoe is suitable. For customers, this measure has the advantage of being directly related to their feet. It applies equally to any type, form, or material of shoe.
However, this measure is less popular with manufacturers, because it requires them to test carefully for each new shoe model, for which range of foot sizes it is recommendable. It puts on the manufacturer the burden of ensuring that the shoe will fit a foot of a given length.
The length of the inner cavity of the shoe also takes into account for the shoe size. This measure has the advantage that it can be measured easily on the finished product.
Finally, the length of the "last," the foot-shaped template over which the shoe is manufactured. This measure is the easiest one for the manufacturer to use, because it identifies only the tool used to produce the shoe.
All these measures differ substantially from one another for the same shoe. Across many systems and countries, the shoe sizes and systems differ greatly. Therefore, great care must be taken when purchasing the correct sizes of shoes online. Make sure that the correct sizes are chosen for the countries or systems being used.