4t=3-4 years old=100cm(in height);5t=4-5 years old=110cm(in height);7t=5-6 years old=120cm(in height);9t=7-8 years old=130cm(in height).100% Brand New&Good QualityProduct: Boys Clothing SetSleeves: Long SleeveMaterial: Cotton/PolyesterColor: *As PictureSize: 2 3 4 5 6 7 suits for 2-7 years.Please check our detailed size chart， 1 CM=0.39 INCH.Attention: - Manual size measurements， please allow 1-3 CM differs.- Color may be little different due to monitor， thank you. Package included: 1*Boys Clothing Set(Top+Pants)