I'm a chick, same height and weight here and I rock a 158cm Never Summer Circuit. The length is a good pow lacerator but you can also slay metal in the park... To figure out what size of a board you want, you must first decide its use (Park board is usally measured right below chin, all mountain at your lips, and pow board at your nose) It also depends on how aggressive a rider you are, if you're a beginner, get a shorter board or vis versa.