Pants size comparison table:
XS size 1 6A28 yard waist 2 feet1
S size 165B 29 size waist 2 feet 2.
M yards 170A yards 30 waist 2 feet 3
L size 170B size 32 waist 2 feet 4.
XL size 175A 34 size waist 2 feet 5.
XXL size 175B 36 yard waist 2 feet 6.
XXXL size180 size 38 waist 2 feet 7
The extended data S is the abbreviation of "small", which means that the small code M is the abbreviation of "medium", the middle code L is the abbreviation of "big", and the big code X is the abbreviation of "surplus", which means surplus.
Reference Size (Clothing) Baidu Encyclopedia