Need advice on what kind of dirt bike to get and what size?

I am around 5 ft 9 in and around 190 pounds. i have ridden before but have never bought a dirt bike before. I am looking for what kind to get and what size. Suggestions would be helpful, thanks.Need advice on what kind of dirt bike to get and what size?
try a 125. if thats too fast for your 'experience level' try a 85 and get a suspension lift kit.Need advice on what kind of dirt bike to get and what size?
Ask in the motorcycle section, this is for bicycles.