Cuteplush Kids Animal Onesie Pajamas Halloween Cosplay Costume 6 YearsSize 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.