Girls typically stop growing by the age of 15, while boys continue to grow until they are about 16, according to KidsHealth. After menstruation begins for girls, they generally grow 1 or 2 inches more. Boys reach a growth spurt between ages 12 and 15, as they become sexually mature.
In boys, once their peak height is reached around 16, their muscles continue to develop, according to KidsHealth. The final growth spurt for boys and girls coincides with puberty, a time where hormone-driven changes rapidly occur in the body. Eating a well-balanced diet and getting plenty of physical activity can ensure healthy growth and development during this time.