Im 20 years old male and I have a small jaw/chin. Does your jaw grow/change naturally after 20 years old? Will taking steroids could possibly enhance my jaw? The jaw makes my face look small and kind of childish - I guess you could say that I started puberty later than everyone else due to the fact that I look younger. I don't think my jaw has developed much during the puberty years, maybe related to overall lower t levels?