Generally speaking, the height of 6-year-old girls ranges from 109 to 126 cm, with a median height of about 117.5 cm, and their weight ranges from 16.3 to 26.8 kg, with a median weight of 20.7 kg, with variations among individuals. Height and weight are affected by both congenital and acquired factors. Congenital factors are mainly genetic and acquired factors include nutrition, exercise and sleep. Children should be regularly monitored for changes in height and weight to see if they are in line with the growth and development curve, etc. If a child’s height does not increase over a long period of time, or if his or her weight does not increase, or even decreases, it is important to actively look for the cause of the disease and take targeted treatment.