Kid XS,height:95-115(cm)==37.4-45.3(inch) Kid S,height:115-125(cm)==45.3-49.2(inch) Kid M,height:125-135==49.2-53.1(inch) Kid L,height:135-145(cm)==53.1-57.1(inch) Kid XL,height:145-155(cm)==57.1-61(inch) Adult S,height:155-165(cm)==61-65(inch) Adult M,165-175(cm)==65-68.9(inch)height: Adult L,height:175-185(cm)==68.9-72.8(inch)Package include:1 bodysuit .1 mask. Product Features The materal is very elastic and breathable,not seathrough ,and comfortable with wearing. The materal is stretchy and wide enough for most chest,mainly according the height for size choosing,please carefully check our size...