The standard height for an 8 1/2 year old boy is about 132cm and the standard weight is about 27kg, with inter-individual variations due to genetic and acquired influences.
The standard height of an 8 1/2 year old boy is about 132cm. If his height is less than 119.3cm, the doctor may determine that he is short; if his height is less than 124.6cm, he may be diagnosed as short. If the height of a 13-year-old boy is greater than 135.5cm, he may be diagnosed as super tall.
The standard weight for an 8.5 year old boy is about 27kg. If the weight is less than 23.23kg, he may be diagnosed as thin; if it is greater than 32.57kg, he may be diagnosed as overweight, and greater than 39.41kg, he may be diagnosed as obese. However, the measurement of weight is not particularly meaningful, as it needs to be judged in combination with height.
Due to genetic and acquired influences, there are differences between individuals. Whether the child’s growth and development is normal or not, it is recommended to visit the doctor for comprehensive judgment, and if there is any abnormality, early targeted treatment.