a longer ski will actually help you on rails. plus 177 really isn't that long and 166 will be short. You wont regret getting the 177 they tend to be a little on the short side anyway.
no they most definitely dont. my 171anthems come to my forehead while my dads volkl 168 come to my lips. searchbar but ive heard kids 177 being the same size as their line 171