Size Chart(Product Measurement):

Bikini Tops:
8-9 Years: Top Length: 9.4", Bust: 24.4-32.3"

10-11 Years: Top Length: 10", Bust: 26-33.9"

12-13 Years: Top Length: 10.6", Bust: 27.6-35.4"

14 Years: Top Length: 11.2", Bust: 29.1-37"

Bikini Bottoms:
8-9 Years: Bottoms Length: 9.3", Waist Size: 22-32.3"

10-11 Years: Bottoms Length: 9.8", Waist Size: 23.2-33.9"

12-13 Years: Bottoms Length: 10.4", Waist Size: 24.4-35.4"

14 Years: Bottoms Length: 11", Waist Size: 25.6-37"