Calculation formula of shoe size: (shoe size+10)/2 = cm.

For example, 4 1 code is: 41+10 = 5151/2 = 25.5cm 41.5 code is 25.75cm.

Extended data

The classification of local shoe sizes includes: English size, American size, Japanese size and so on.

Europe

The shoe sizes of France, Germany and other continental European countries are generally calculated as follows, in centimeters:

Shoe size = 1.5* last length = 1.5* (foot length +2)

However, due to the different characteristics of shoe last, the specific size may be slightly different.

North America

Shoe sizes in the United States and Canada measure the length of last in inches:

Men's shoe size = 3* last length -22

Women's shoe size (normal) = 3* last length -20.5

In addition, there is a relatively rare size of women's shoes, which was put forward by the American Footwear Association:

FIA = 3 * final length -2 1

The shoe size of boys and girls is the calculation method of men's shoe size+12.33.

Hong Kong

American and European shoe sizes are widely used in Hong Kong. Generally, Hong Kong men wear shoes of size 42-48 (European size), while women wear shoes of size 36-40 (European size). Generally speaking, the length of the foot determines the shoe size, but if the foot version is wider (above 9.5cm) or thicker, it is necessary to add half a size. For example, if the feet are 29.5-30.0 cm long, you should wear shoes of size 46 (European size). If your feet are 27.5cm long, you should wear size 43 (European size) shoes.

Men's Shoes

In the late 1960s, Chinese mainland formulated the "China Shoe Size" based on the national foot length measurement, with the length range of 1 (1 cm) and the width of 1 (narrowest) -5 (widest).

1998, the government issued the China people's standard GB/T3294- 1998, which is called "new shoe size" based on the Mongolian multi-point system and in millimeters. The shoe size in centimeters used to be called "old shoe size" from now on.

2 1 century shoes in Chinese mainland market are required to be marked with new shoe sizes.

The conversion formula of old and new shoe sizes is: new shoe size = (old shoe size+10)/2. (New shoe size needs to be converted into units)

Example:

If the old shoes are size 40,

Then the new shoe size = (40+10)/2 = 50/2 = 25cm = 250mm.

The size of the new shoes is size 250.

It should be noted that the old code of Chinese mainland and the European code (French code, EU code) are essentially different and cannot be confused or used interchangeably. China and Hongkong have always followed the European size system, taking the European code as the standard unit. Japan and Chinese mainland have the same new shoe size, using the standard Mondo 5 mm decimal system.