The height and weight of six-month-old babies will vary slightly depending on gender. Under normal circumstances, the normal height of a six-month-old male baby is 64.2~73.2cm, and his weight is 6.9~10.3kg, while the normal height of a female baby is 62.7~71.5cm, and her weight is 6.4~9.6kg. It should be noted that the height and weight of infants are affected by many factors such as genetics, nutrition and environment, and there is no uniform absolute standard for individual differences. There is no uniform absolute standard. A comprehensive judgment can be made based on the infant’s feeding, height and weight gain. If the height and weight of a six-month-old baby is significantly lower than that of a baby of the same age, it is necessary to take the child to the hospital in a timely manner.