Children’s height and weight are not the same at different ages, especially in different ethnic groups, different regions, such as urban and rural areas, Europe, America, and China are also different. In China at present children’s height is probably calculated according to the following proportions, such as 6-year-old children, the first 6 months is calculated according to the following height, about 1 year old average length of 25cm, according to the average height at birth of 50cm, 1 year old should be 75cm, 1-2 years of age between the general growth of 10cm, is 85cm, 2 years of age after the average height of about 7cm per year, 4 years time 4 x 7 = 28cm, plus 85cm, is about 1.13m, this is the average height. Of course, there is a slight difference between men and women, but not much at this age. Children’s weight actually urban and rural areas also have differences, but the average algorithm is the first half of the month to grow 600g, then 3600g. this is half a year old in the birth weight based on the increase of 3600g, the second half of the month is every month to grow 500g, that is, 3,000g. so the first year down to grow 6.6kg, 6.6kg is equivalent to more than 13 pounds, so plus the birth weight, for example, 6-8 pounds, so the average weight at the age of 1 year can be 10kg. At the age of 1, the average weight can be 10kg, that is, about 20kg. 2kg per year between the age of 1-6 years, it should be 10kg in 5 years, plus 10kg at the age of 1 year, so the weight of a child at the age of 6 years is about 20kg, which is the average weight.