OP, how big are your hands and feet? If they're out of proportion with the rest of your body, i.e. fairly large compared to your height, you might not have had the puberty growth spurt yet. Hands and feet grow first, then stop, then the rest of the body continues to grow, until puberty is over. People can grow once puberty has ended, but it's usually down to some abnormal growth condition, but puberty might not be over for you yet. With girls, it's easy to tell when puberty has ended (menstruation). They don't grow much after that, so they're likely to stop growing in their early teens, or younger. With boys, it's less obvious to tell that puberty has ended. They tend to start puberty later and it goes on for longer too, sometimes until their early 20s. So, if a boy is 20 and still growing, he's probably still going through puberty.
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"We act as though comfort and luxury were the chief requirements of life, when all we need to make us really happy is something to be enthusiatic about." Charles Kingsley