Mom's 5'4, and dad around 5'11. my brother's about 5'11 too, but i'm 5'6. i'm 20 y/o and he's 23. have i stopped growing? how to know? how can i grow?

No growth last year?: If no growth in the past year, then growth has finished. Most people reach their maximum height in their late teens. Without nutritional problems or chronic childhood illnesses, height is largely based on genetics and parental heights. Aside from eating right, exercising, sleeping well, and being happy, there's not much a person nor his doctor can do to increase height.

See endocrinologist: You are likely finished growing, but some males do continue for another few years. Look up david robinson (U.S. Naval academy) nba player. He is the exception. See the endocrinologist -- the expert in hormones linked to growth and growth patterns and statistics. Did your brother continue to grow past 20 y.O ? If so, you may also.

Growth Predictions: Read==>http://www.Fpnotebook.Com/endo/exam/mdprntlhght.Htm. You can calculate, approximately, your expected height. Note the different formulas for boys and girls. At age 20, your epiphyses have closed and you have stopped growing. However, consult with your doctor to see if he would prescribe a well-controlled growth hormone regimen to add some inches to your frame.

Do this instead: It is probable that your maximum height will be 5'6", same as steve mcqueen and two inches taller than superstud michael j fox. I've seen evidence that shorter men age slower & live longer. Because you are a man, you can look good naturally by hitting the gym hard, building your muscles and gaining definition. Tall is fun but buffed gets respect & is far more useful. Good luck.

Missing some info.: Firstly, you never mentioned your gender which would be key to determining the height. Racial factors and nutrition can also affect things and for many calculation tools, weight would be helpful. The most accurate way to predict height would be with wrist x-rays. But with what we got, based only on your parents, a boy would be predicted to be 5'10" and a girl 5'5" using the gray method.