Size Chart:(Product Measurement)
8Y:Straps Length:11.3IN,Bust:28.3IN,Length:26.8IN
9Y:Straps Length:11.6IN,Bust:29.5IN,Length:28.1IN
10Y:Straps Length:11.8IN,Bust:30.7IN,Length:29.5IN
11Y:Straps Length:12.0IN,Bust:31.9IN,Length:30.9IN
12Y:Straps Length:12.3IN,Bust:33.1IN,Length:32.3IN
This data was obtained from manually measuring the product, it may be off by 0.39-0.79 IN