I'm 6'7" 230 lbs with size 14 boot. Prior to this board, I rode a 177 cm and I bought the 172. It's a world of difference in terms of maneuverability and control. I'm a intermediately-skilled rider, but was able to hit some nice kickers and felt empowered to try more than I ever have on this board. I also tried the 169 but it was a bit too short for me (I found it a little twitchy and really sank down into the powder). The Magne-Traction makes holding a line noticeably different. I'm a convert and would recommend this board to any other big rider.