Size information:
4Tsuitable for height 37-41" Age 2-4 year
5T suitable for height 41-45" Age 4-6 year
6 Years suitable for height 45-49" Age 6-8 years
8 Years suitable for height 49-53" Age 8-10 years
10 Years suitable for height 53-57" Age10-12 years
Pls refer oursize chart, according your height to select your size; the costumes is loose design. If you are a little Slightly overweight ,you can choose one size up.