Height refers to the vertical distance from the vertex (V) to the ground. Generally speaking, the unit is centimeter (cm), and "meter" (m) is commonly used. Height is the length of the longitudinal part of the human body, which originates from the longitudinal growth of the human body and is greatly influenced by genetic factors. The height development of girls is earlier than that of boys, and the rapid growth period is from 12 to 13 years old, and the growth stops at 19-23 years old.

Boys' height develops late, growing rapidly at 15- 16 years old and stopping growing at 20-25 years old. The long bones and vertebrae of the limbs have ossified and their height has stopped growing.

There are many factors that affect height, such as heredity, nutrition, exercise, environment, living habits, race, endocrine, sexual maturity (menarche age 18 ratio1height 5 cm), distant marriage, medical progress and so on.

The Report on Nutrition and Chronic Diseases of China Residents (2020) shows that the average height of men and women aged 18-44 in China is 169.7cm and 158cm respectively.