Size Chart(Product Measurement):

Bikini Bottoms:
13 Years: Length: 10", Waist Size: 23.2-36.2", Hip Size: 27.2"

14 Years: Length: 10.4", Waist Size: 24.4-37.4", Hip Size: 28.3"

15 Years: Length: 10.8", Waist Size: 25.6-38.6", Hip Size: 29.5"

16 Years: Length: 11.2", Waist Size: 26.8-39.8", Hip Size: 30.7"

Bikini Tops:
13 Years: Length: 6.8", Underbust: 24-36.2", Straps Length: 15"

14 Years: Length: 7.1", Underbust: 25.2-37.4", Straps Length: 15.4"

15 Years: Length: 7.4", Underbust: 26.4-38.6", Straps Length: 15.7"

16 Years: Length: 7.7", Underbust: 27.6-39.8", Straps Length: 16.1"