1. Height and weight standards for 5-year-old babies According to the child growth and development standards issued by the World Health Organization, the average height of 5-year-old boys is 110.6 cm and weight is 19.3 kg; the average height of 5-year-old girls is 109.4 cm and weight is 18.7 kg. But it’s important to note that this is just an average, and not all children should reach this standard. 2. Factors affecting the height and weight of a 5-year-old baby 1. Genetic factors: The height and body shape of the parents will have an impact on the child\’s growth and development; 2. Nutritional intake: A reasonable diet structure and nutritional intake will have an impact on the child\’s growth and development.