I have a snowboard (Borton TWC Standard 12-13) 157 cm. I want to buy Wheelie Gig Bag (http://www.burton.com/default/wheelie-gig-bag/F14-10994100.html?cgid=mens-board-bags). This bag is available in sizes: 146 152 156 162 166. There is no 157 size.
What size should I take and why?