8-year-old boy, normal height and weight.

According to the height and weight standard of children, the height standard of an eight-year-old boy should be age *7+70, which is 126 cm; the weight should be age *2+8, which is 24 kg. This is a standard height and weight. In fact, it will fluctuate within a range. Generally speaking, each child's height is related to genetic factors, environmental factors and their own nutritional status.