i would go by your weight more than your height. Weight is important for how the board performs and length is more of a preference to a point. I would use this chart. Never Summer Snowboard Size Chart - 2011 LOL after looking at the chart this link wasnt much help.
Lol yup That's what I seem to keep finding about sizes. I really wanna go with the 153 cause I found one with a blue base.... I just hope it isn't too small. But what's 2cm anyways right? (Crosses fingers)