Boys generally stop growing after their epiphyses close, usually around the age of 16-18. Epiphyseal closure is when the epiphyseal plate stops growing and the epiphysis closes during a child’s growth spurt. Epiphyseal closure occurs at different times in different bones. Some epiphyses close earlier, while others, especially in long bones, may close relatively later. Generally, a child stops growing when all the epiphyses close, especially the epiphyses of the long bones. The age of epiphyseal closure in boys is usually around 16-18 years of age. It should be noted that the age of cessation of growth varies greatly among individuals, e.g., due to genetic factors, some may stop growing earlier and some later, but overall growth and development is normal and is usually a normal physiological phenomenon. If a boy stops growing at an age significantly earlier than his peers, it is recommended that he seek medical attention.