4-5 years:Suitable for height 39-43 inche,weight 30-41 lb. 5-6 years:Suitable for height 41-47 inches,weight 39-50 lb. 7-8 years:Suitable for height 45-51 inches,weight 48-59 lb. 8-9 years:Suitable for height 49-55 inches,weight 57-68 lb. 9-10 years:Suitable for height 53-59 inches,weight 66-77 lb. The occasion of Suit:Great for beach,swimming,gymnastics,surfing,pool party,vacation,school,swimming lessons,and so on. Buttery soft fabric for kids' sensitive skin and durable for daily wear.Times with 1-PC or 2-PC options,sizes 2 thru 10. Adjustable strap for the girl's swimsuit easy to put and on. Girls'bathing suits with high-quality material, bright colors,and cute patterns. GREAT GIFT FOR YOUR LITTLE GIRLS!