What is the normal size for a three year old?

The normal size for a three-year-old can vary widely, but generally, the average height is about 34 to 40 inches (86 to 102 cm) and the average weight is around 25 to 38 pounds (11 to 17 kg). Individual growth patterns may differ based on genetics, nutrition, and overall health. Regular check-ups with a pediatrician can help ensure that a child's growth is on track.