depends on how much muscle you got to whip around a bigger ski. im 5"8, and wont ride anything less than 180. i ride 183s in the park, and have noooo problem whipping around 270s onto ollie-ons, or poppin flatland 3s. bigger skis are smoother, faster, tougher, and jst ride alot better than short ones. plus they look better. as long as its not a really heavy ski, there is no reason not to go a bit bigger, unless you really wanna huck 7s off 10 ft jumps.