Children have different height standards for different ages. Height standards can be measured in standard deviations. Within plus or minus two standard deviations is considered normal. The first concept to familiarize yourself with is the median. The median is the height of all the children arranged from largest to smallest in a numbered series. The middle of the list is the median height. Compared to children of the same age and sex, the median is considered abnormal if it is two standard deviations above or below. Height within plus or minus two standard deviations is considered normal. For example, the median height of a one-year-old child is 76.5 centimeters, 71.2 centimeters below two standard deviations, and 82.1 centimeters above two standard deviations. Then heights within 71.2 centimeters and 82.1 centimeters are considered normal. Any height above this range is considered abnormal. Regular pediatric checkups to measure height help us to detect early problems in height growth in children. If a problem is detected once, consult a specialized pediatrician to find a solution.