3-year-old baby height 87 cm is normal, because the height standard of 3-year-old baby is between 86-110 cm, the baby’s height and the following several several factors related to: 1, some babies just grow late, so the age of small, height will appear than relatively short. 2, because the parents are shorter, because of genetic factors caused by the baby is also shorter. 3, is the male baby and The difference between female babies, male babies grow faster, basically the same age than female babies to grow taller. If the baby is short along with other developmental abnormalities, you need to go to the hospital in time to test the trace elements to see if it is caused by a lack of trace elements, and then make the appropriate supplement according to the test results.