Size Chart(Product Measurements):

8 Years: Bicep Length: 11.0", Bust: 28.7", Cuff: 7.5", Length: 29.5", Shoulder: 11.8", Sleeve Length: 18.3", Waist Size: 23.6-29.1"

9 Years: Bicep Length: 11.3", Bust: 29.9", Cuff: 7.6", Length: 30.9", Shoulder: 12.3", Sleeve Length: 19.1", Waist Size: 24.4-30.3"

10 Years: Bicep Length: 11.7", Bust: 31.1", Cuff: 7.8", Length: 32.3", Shoulder: 12.8", Sleeve Length: 19.9", Waist Size: 25.2-31.5"

12 Years: Bicep Length: 12.3", Bust: 33.5", Cuff: 8.1", Length: 35.0", Shoulder: 13.7", Sleeve Length: 21.5", Waist Size: 26.8-33.9"