text: is 5"3 a normal hieght for a gonna turn 15 year old in 2 months girl? or is it average?   hi, that is about average, but you most likely will grow another inch or two. you'll stop growing taller when you reach pubuerty. if height is your concern, excercise and eat a healthy diet. a few extra pounds will show on you, so make certain you excersie regularly. an overweight body always looks shorter than a slim build.