The normal height of a three-month-old baby is about 54~69 centimeters and the weight is about 4.4~9.37 kilograms, but there are individual differences. In general, a three-month-old baby’s height is around 54~69 centimeters and weight is around 4.4~9.37 kilograms. As each baby’s growth and development is different, height and weight are affected by genetics, nutrition, disease and other factors, individual differences are large, the above data can be used as a reference, but not absolute. Three months baby is in the most important stage of growth and development, usually need to give the baby more nutritious food, appropriate out of the house activities in the sun, can promote the growth and development of the baby. If the weight or height of the three-month-old baby is significantly different from that of babies of the same age, you need to bring your baby to the doctor in time to determine whether there is a disease, so as not to affect the baby’s physical development.