About the size of the clothers ,
Different country has different standard.
So before you choose the size, measure it .and control the size table.
Eg. If your body weight is in 45-55kg (99.2lb -121.2 lb ), your height is in 150-4000px (59.1 62.9 inch), choose the size S.
Item measured by hand , it may be 2-3 cm in error.