Size Chart(Product Measurement):

8 Years: Bicep Length: 9.4", Bust: 27.6", Cuff: 6.3", Length: 15.0", Shoulder: 11.8", Sleeve Length: 18.1"

9 Years: Bicep Length: 9.8", Bust: 28.7", Cuff: 6.5", Length: 15.7", Shoulder: 12.3", Sleeve Length: 18.9"

10 Years: Bicep Length: 10.1", Bust: 29.9", Cuff: 6.6", Length: 16.5", Shoulder: 12.8", Sleeve Length: 19.7"

11-12 Years: Bicep Length: 10.7", Bust: 32.3", Cuff: 6.9", Length: 18.1", Shoulder: 13.7", Sleeve Length: 21.3"