Size chart for Adult Onesie 
  
  S - Size fits for height  59"-63" / 148cm-158cm 
    M- Size fits for height  63"-67" / 158cm-168cm 
  L- Size fits for height  67"-71" / 168cm-178cm 
    XL - Size fits for height  71"-73" / 178cm-185cm 

size chart for kids Onesie 
  XS(85) - Size fits for height  39"-43" / 100cm-110cm 
S(95) - Size fits for height  43"-47" / 110cm-120cm 
   M(105) - Size fits for height  47"-51" / 120cm-130cm 
  L(115)- Size fits for height  51"-55" / 130cm-140cm 
     XL(125) - Size fits for height  55"-57" / 140cm-145cm