In the national standard GB/T 1335, the size of S (small) is 155/80A, the size of M (medium) is 160/84A, and the size of L (large) is 165/88A. "Size" refers to the length of clothes.
For example, 165/88A, the numbers before and after the diagonal line indicate the height of the human body and the bust or waist of the human body, and the letters after the diagonal line indicate the physical 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.
Extended data:
Commonly used in the world: S, M, L, XL, XXL to indicate size, S is the abbreviation of "small", M is the abbreviation of "medium", L is the abbreviation of "big", and X is the abbreviation of "redundant", indicating redundancy.
Female S= 155= trumpet, M= 160= medium, L= 165 large, XL =170 large (and so on) male S= 165= trumpet, m.
References:
Baidu Encyclopedia-Sizes (Clothes)