A four and a half year old baby’s height of 108 centimeters is normal. The child’s height growth and development is affected by many factors including gender, genetic factors and acquired nutrition, the general four and a half year old boy’s height should be 103 to 111.2 centimeters, the girl’s height should be 102 to 110.4 centimeters, the current 108 centimeters within the normal range. Four and a half years old when the child’s height as well as all aspects of growth and development of an important stage, parents must pay attention to diet and nutritional balance, vegetables and fruits, dairy products, eggs should be at the same time intake, to avoid the child picky eaters favoritism, which may lead to insufficient intake of nutrients, which affects the height of the development. In addition, the child in the process of growth and development, occasionally a stage of height fluctuations is normal, it is recommended that regular physical examination, if any abnormality in a timely manner to consult a doctor.