Size Chart(Product Measurements):

8 Years: Bicep Length: 11.4", Bust: 31.5", Cuff: 10.8", Length: 19.9", Shoulder: 13.2", Sleeve Length: 6.3"

9 Years: Bicep Length: 11.7", Bust: 32.7", Cuff: 11.1", Length: 20.7", Shoulder: 13.7", Sleeve Length: 6.5"

10 Years: Bicep Length: 12.0", Bust: 33.9", Cuff: 11.5", Length: 21.5", Shoulder: 14.1", Sleeve Length: 6.7"

12 Years: Bicep Length: 12.7", Bust: 36.2", Cuff: 12.1", Length: 23.0", Shoulder: 15.1", Sleeve Length: 7.1"

14 Years: Bicep Length: 13.3", Bust: 38.6", Cuff: 12.7", Length: 24.6", Shoulder: 16.0", Sleeve Length: 7.5"