The length of a foot is commonly defined as the distance between two parallel lines that are perpendicular to the foot and in contact with the most prominent toe and the most prominent part of the heel. Foot length is measured with the subject standing barefoot and the weight of the body equally distributed on both feet.
The sizes of the left and right feet are often slightly different. In this case, both feet are measured, and purchasers of mass-produced shoes are advised to purchase a shoe size based upon the larger foot because, contrary to the reality of foot sizes, most manufacturers do not sell pairs of shoes in non-matching sizes. Each size of shoe is considered suitable for a small interval of foot lengths. The inner cavity of a shoe must typically be 15–20 mm longer than the foot, but this relation varies between different types of shoes
THERE ARE THREE CHARACTERISTIC LENGTHS A SHOE SIZE CAN REFER TO:
All these measures differ substantially from one another for the same shoe.
Sizing systems also differ in what units of measurement they use. This also results in different increments between shoe sizes because usually, only "full" or "half" sizes are made.
The following length units are commonly used today to define shoe-size systems:
Due to the different units of measurements, converting between different sizing systems results in rounding errors as well as unusual sizes such as "10 2⁄3".
The sizing systems also place size 0 (or 1) at different locations:
If size 0 is placed at a foot's length of 0, the shoe size is directly proportional to the length of the foot in the chosen unit of measurement. Sizes of children's, men's, and women's shoes, as well as sizes of different types of shoes, can be compared directly. This is used with the Mondopoint and the Asian system. However, size 0 can also represent a length of the shoe's inner cavity of 0. The shoe size is then directly proportional to the inner length of the shoe. This is used with systems that also take the measurement from the shoe. While sizes of children's, men's and women's shoes can be compared directly, this is not necessarily true for different types of shoes that require a different amount of "wiggle room". This is used with the Continental European system.
Further, size 0 (or 1) can just be a shoe with a given length, typically the shortest length deemed practical. This can be different for children's, teenagers', men's, and women's shoes, making it impossible to compare sizes. For example, a women's shoe at size 8 is a different length from a men's shoe at size 8 in the US system, but not the British.
Some systems also include the width of a foot. There are different methods indicating the width:
The measured width is indicated in millimetres (mm). This is done with the Mondopoint system.
The measured width is assigned a letter (or combination of letters), which is taken from a table (indexed to length and width) or just assigned on an ad-hoc basis: Examples include (each starting with the narrowest width):
A, B, C, D, E, EE, EEE, EEEE, F, G (typical North American system; medium being D)
4A, 3A, 2A, A, B, C, D, E, 2E, 3E, 4E, 5E, 6E (variant North American)
C, D, E, F, G, H (common Aus/UK "medium" is usually E or F, but varies by manufacture one maker's E is not necessarily the same size as another's.
N (narrow), M (medium) or R (regular), W (wide)
The width for which these sizes are suitable can vary significantly between manufacturers. The A-E width indicators used by most American,Canadian, Australian and some British shoe manufacturers are typically based on the width of the foot, and common step sizes are 3⁄16 inch.
This sizing chart is designed as a comparison to commonly used sizing systems . The systems differ in what they measure , what unit of measure they use and where the size 0 is positioned . The english system for mens shoes that i use is based on the length of the last measured in barleycorn 1/3inch . If you are uncertain of your size and how it translates to my sizing system please email and we will endeavour to assess your size .