I'm a 17 year old boy, when will my face and body be fully matured?

Now: There should be no more changes of your head size or face.

Hair growth?: Your body will change constantly through your life. Are you asking about your body and facial hair? These may be fully developed by age 16, or may still be developing into your early 20's. Most guys envy a thick beard and hairy chest but many women prefer a naturally smooth man. Enjoy whatever you've gotten, and keep your body lean and physically fit to look and feel great.

Maturity: Maturity for males starts at different time during teen age years and continues into your mid twenties at different rates. There are genetic and environmental factors as well as medical conditions that effect this maturation. If you feel like there is a problem with your maturation please discuss with your physician. If you are just wondering be patient and enjoy the ride over the next 10 years.

You are done.: A lot of factors involved, in your normal maturation(puberty), boys , girls are different, body fat, leptin, and onset of puberty, genetic contributors, other factors .Your are done growing