if your a kid an still growin den go sumwhere within 3cm each way of your actaul height, stopped growin= about da same for powder, cud maybe go bit bigger, normal cruizin= 10cm shorter. and if u ski anything about 5 to 10cm shorter, park is up to what you like, well i guess all of those are but more so for the park skis, id go about ur own height for park though