That MSCR dude is flat out wrong, epimitheus is right, skis should be pretty big. ONly ninnies like mike nick ski on tiny skis... Jon olson is 5'9' and skis on 180s if that gives you any perspective. Also, most people buy twins smaller than normal skis cuz they are better for spinning and shit, but don't be a pussy, twin tips should actually be longer, cuz of the 2nd tip, there is actually like 5-10 cm of edge that isn't on the snow, therefore, buy bigger.
^^^Drop into the Pipe and Smoke it^^^