Size Chart(Product Measurement):

Tops:
8 Years: Shoulder: 11.8", Length: 13.8", Bust: 30.3"
9 Years: Shoulder: 12.3", Length: 14.4", Bust: 31.5"
10 Years: Shoulder: 12.8", Length: 15.0", Bust: 32.7"
11-12 Years: Shoulder: 13.7", Length: 16.1", Bust: 35.0"

Bottoms:
8 Years: Length: 31.1", Waist Size: 20.5", Hip Size: 31.9", Thigh: 20.9"
9 Years: Length: 32.5", Waist Size: 21.1", Hip Size: 33.1", Thigh: 21.6"
10 Years: Length: 33.9", Waist Size: 21.7", Hip Size: 34.3", Thigh: 22.3"
11-12 Years: Length: 36.6", Waist Size: 22.8", Hip Size: 36.6", Thigh: 23.7"