Can't comment specifically on sizing, it can be boot specific, but many have had problems with sizing on these as they tend to run small. On a related note, I had a chance to see these in person and they quality, feel and ratchets just seemed garbage to me. If your looking lightweight all-mountain check out the Burton Cartels. Check out Rome targas and 390s too, however they're a little on the heavy side. The unions just felt like cheap toys next to Cartels, and weight seemed to be very close.