Size Chart:(Product Measurement)
8Y:Straps Length:10.2IN,Bust:23.2IN,Length:30.7IN
9Y:Straps Length:10.6IN,Bust:24.4IN,Length:31.9IN
10Y:Straps Length:11.0IN,Bust:25.6IN,Length:33.1IN
11Y:Straps Length:11.4IN,Bust:26.8IN,Length:34.3IN
12Y:Straps Length:11.8IN,Bust:28.0IN,Length:35.4IN
This data was obtained from manually measuring the product, it may be off by 0.39-0.79 IN