Hello there. I'm 19 years old, 170 lbs, and 5'5 in height. I am about 1.5 inches when flaccid and 4.5 when erect. I keep thinking to myself, will it grow bigger but it just never does. I think I'm not circumcise either, can that be the case, or is it that my penis hasn't grow to it size yet? Can I still grow my penis please help.