Will my head / face grow if they are small and i'm only 18?

Growth: Most growth is usually done by 18 if you're a female. Males will still grow a little more; however the majority of growth is done. A simple test to see if any growth is left is to take a hand wrist x-ray. This can then be coorelated to the head and face all based in growth research studies. Consult with an orthodontist and ask for a hand wrist x-ray.