A six month old baby’s height of 65cm is usually normal. The normal range of height varies by gender of the baby, even at the same age. Most six-month-old female babies are between 64.5 and 69.1cm in height, while the range for male babies is between 66 and 70.8cm. If the height of female babies is lower than 62.3cm and that of male babies is lower than 63.7cm, it is considered abnormal height development. So in general, six-month baby height 65cm is usually normal, but it should be noted that the growth of children’s height for the non-equal speed of increase, the evaluation should be based on individual children’s own changes, not the so-called “normal value” as “standard”! Do not take the so-called “normal values” as the “standard” for evaluation. If there is any abnormality, it is necessary to consult a doctor in time to identify the cause of the disease and carry out targeted treatment.