Size Chart(Product Measurement):

8 Years: Bust: 23.6", Length: 30.3", Straps Length: 11.0", Waist Size: 22.8-29.1"

9 Years: Bust: 24.8", Length: 32.3", Straps Length: 11.4", Waist Size: 23.6-30.3"

10 Years: Bust: 26.0", Length: 34.3", Straps Length: 11.7", Waist Size: 24.4-31.5"

11-12 Years: Bust: 28.3", Length: 37.6", Straps Length: 12.2", Waist Size: 26-33.9"