S is the abbreviation of "small", which means the code is small; X is the abbreviation of "redundant", which means extra.

So XS means less than small, so it is very big.

XS is suitable for people who are very embarrassed to wear it; S is suitable for thin people.

Extended data:

There are two types of ordinary clothes: one is S (small), the other is M (medium), and the other is L (large) and XL (large). The second is the form of height plus bust, such as 160/80A, 165/85A, 170/85A, etc. The first label is not standard. Whether domestic or imported clothing, models must be marked according to China's clothing model standard GB/T 1335, and English letters can only be used as auxiliary codes.

M is the abbreviation of "medium", which means medium code L is the abbreviation of "large", which means large code.

M, medium height, this style is suitable for people of medium height;

L, large, this style is suitable for tall people to wear;

XL, plus size, this style is suitable for people who are slightly fatter;

XXL, plus large size, this style is suitable for obese people to wear;

XXXL, size 3 or above, this style is suitable for super fat people.