Between what ages do young children experience dramatic gains in height and weight?

Young children typically experience dramatic gains in height and weight between the ages of 1 and 2 years, as they transition from infancy to toddlerhood. During this period, they may gain about 5 pounds and grow around 5 inches in height each year. Additionally, significant growth spurts often occur again between the ages of 3 and 5 years, as children continue to develop rapidly in early childhood.