US Child Size Chart: X-Small:height 100-110cm/ 39.3-43.3in, chest 66-69cm/26-27in, Waist 58-61cm/23-24in Small:height 110-120cm/ 43.3-47.2in, chest 71-74cm/28-29in, Waist 61-64cm/24-25in Medium:height 120-130cm/47.2-51.2in, chest 76-79cm/30-31in, Waist 64-66cm/25-26in Large:height 130-140cm/51.2-55.1in, chest 81-84cm/32-33in, Waist 66-69cm/26-27in X-Large:height 140-150cm/55.1-59.1in, chest 86-89cm/34-35in, Waist 69-71cm/27-28in XX-Large:height 150-160cm/59.1-63.0in, chest 91-94cm/36-37in, Waist 71-74cm/28-29in