Normally a one and a half year old baby’s height of 80 is normal, and the normal range for a one and a half year old baby’s height is around 78 to 87 centimeters. When a normal newborn is born, the average height is about 50 centimeters, and the fastest growth in height is about 25 centimeters in the first year of life. At one year of age, the height is about 75 centimeters and slows down to about 10 to 12 centimeters in the second year. At two years of age, the height is about 87 centimeters, and a one and a half year old child should be around 78 to 87 centimeters tall. So, a height of 80 is normal for a one-and-a-half year old baby. However, the growth of children’s height is not equal to the speed of increase, the evaluation should be based on the individual child’s own changes, not the so-called “normal value” as a “standard” for evaluation. In normal times, it is necessary to provide children with a better nutritional base, maintain adequate dietary intake of nutrients and balanced nutrition, and eat more foods rich in protein and vitamins, which is the basis for the development of the child’s height. At the same time should be appropriate outdoor activities, as well as adequate sleep and good quality of sleep. These are very important for the synthesis and secretion of growth hormone. If your baby’s height is significantly low, it is important to have your child examined and evaluated, and to make appropriate improvements under the guidance of your doctor, so as not to delay your child’s growth and development.