The standard height of a 6-month-old male baby is 67.2-72.4cm and the standard weight is 7.72-9.78kg; the standard height of a 6-month-old female baby is 65.7-70.5cm and the standard weight is 7.20-9.06kg, but there are individual differences. Weight is the combined weight of body tissues, organ systems and body fluids, and is an important indicator reflecting the nutritional status of children; height (length) refers to the vertical distance from the top of the head to the bottom of the foot, and short-term nutritional fluctuations and illnesses have basically no effect on it. Generally speaking, the standard height of a 6-month-old male baby is 67.2~72.4cm and the standard weight is 7.72~9.78kg; the standard height of a 6-month-old female baby is 65.7~70.5cm and the standard weight is 7.20~9.06kg. However, due to genetic and environmental factors, there are individual differences in the height and weight of babies, so continuous observation of growth and development indicators is very important for a comprehensive understanding of the growth and development of children, should avoid the “standard value” as the basis for evaluation, should take into account the individual differences, in order to make accurate judgments. If there is any abnormality, consult a doctor in time.