The normal height and weight of a 4-month-old baby girl is 61.6cm-66cm, and the normal weight is 6.26kg-7.76kg. The height and weight of a baby are affected by genetics, geography, nutrition, sleep, etc. The normal height for a 4-month-old baby girl is 61.6cm-66cm, and the normal weight for a 4-month-old baby girl is 6.26kg-7.76kg, depending on the individual, but as long as the baby’s height and weight are within the standard ranges, the baby’s height and weight are considered normal. The height and weight standards for babies are based on the height and weight of the majority of the population statistically, and there are obvious individual differences. However, if your baby’s height and weight deviate from the normal range, it is recommended that you see a pediatrician at a children’s hospital to rule out growth and developmental problems.