Size Chart:

Bikini Tops:
9-10 Years: Top Length: 8.7", Bust: 32.3", Underbust: 23.6"
11-12 Years: Top Length: 9.3", Bust: 33.9", Underbust: 25.2"
13-14 Years: Top Length: 9.8", Bust: 35.4", Underbust: 26.8"
14 Years: Top Length: 10.4", Bust: 37.0", Underbust: 28.3"

Bikini Bottoms:
9-10 Years: Bottoms Length: 8.8", Waist Size: 23.6-32.3"
11-12 Years: Bottoms Length: 9.3", Waist Size: 24.8-33.9"
13-14 Years: Bottoms Length: 9.8", Waist Size: 26-35.4"
14 Years: Bottoms Length: 10.4", Waist Size: 27.2-37"