165/72a is the size of trousers, 165 stands for the appropriate height of about 165cm, 72 stands for the appropriate waist circumference of about 77.5cm, and A stands for the appropriate general figure.

In the national standard GB/T 1335, the numbers before and after the diagonal line indicate the height of the human body and the chest circumference or waist circumference of the human body, and the letters after the diagonal line indicate the body shape characteristics of the human body. Type Y refers to the figure with big chest and thin waist, type A refers to the general figure, type B refers to the slightly fat figure, and type C refers to the obese figure. The way to tell a figure is to look at the bust minus the waist. 165/72a means a person who is suitable for height 165cm and has a general body shape.

Extended data

Standard waist circumference calculation method:

Waist circumference = 1/2 of height minus 19 cm (for example, the standard waist circumference of height160cm =160cm/2-19 = 61cm).

According to the relevant national standards in China, the clothing sizes of adult men and women are expressed by the size system. Usually, the labeling methods we see, such as S, M, L (usually used in casual clothes), or 27, 28, 29 (usually used in pants), or 44A, 44B, 46A (usually used in suits), are not standardized. Many brands will work with you to supplement the size system.