A child’s height is determined by comparing it to the standard height of a normal child of the same race, sex, and age, which is calculated from the physical measurements of a large number of representative healthy children. 2-12 year old children’s height can be assessed by the following formula: age x 7 + 70 (cm). A child is considered short if his or her height is below the mean value for healthy children of the same age and sex minus 2 standard deviations or below the third percentile. If the height is between 1 standard deviation and 2 standard deviations from the mean for healthy children of the same age and sex, the child is considered short. Parents can compare their child’s height with the standards in the table to know whether it is short or dwarf. If it is short, they should go to the pediatric endocrinology department of the hospital as soon as possible for further examination to clarify the cause, and if it is short, they should closely observe their child’s height growth rate, and if it is not satisfactory, they should further examine the cause.