Material:85% Polyester/15% Spandex little girls swimsuit come with a swim hat，stretchy and soft fabric, skin-friendly,quickly drying Fits:Swimwear with Swim Hat for 6-12 months, 12-18 months 18-30 months, 30-42 months 5-6T Size Chart Age Cloth Length fit Height Weight Size 2 6-12 months 13.78 inch 27.5-31.49 inch 6-10 kg Size 4 12-18 months 14.57 inch 31.49-35.4 inch 10-14 kg Size 6 18-30 months 15.35 inch 35.4-39.37 inch 14-18kg Size 8 30-42 months 16.14 inch 39.37-43.3 inch 18-21kg Size 10 5-6 T 16.93 inch 43.3-47.2 inch 21-25kg