Code 39: (39+10)/2 = 24.5cm; 38 yards: (38+ 10)/2=24 cm
Shoe size, also known as shoe size, is generally marked as follows: international, European, American and British. The international standard shoe size indicates the millimeter of foot length. The China standard measures the size of shoes in millimeters or centimeters. For example, 123 means in millimeters and 12.3 means in centimeters. In fact, the two references are the same.
Extended data
Measurement method of shoe size:
When measuring, the body should be upright and the weight should be evenly distributed on both feet.
Step on the ground with your foot and measure the vertical distance from the longest toe to the heel.
Optimal measurement time:
It is suggested that it is best to measure the foot size in the afternoon, because the foot will expand slightly in the afternoon, and the determined size is the most comfortable to wear at this time.
People's left and right feet are basically symmetrical, but there must be subtle differences in size, so when measuring the size of shoes, you should choose the bigger one.