I went to try some 2016 Radar Profile bindings on today. I'm a 9.5 shoe size and found the 10 was okay. My big toe was at the end pushing into the lining a bit but not bent. All they had in the shop were two right 10s so I tried them both on and there was a difference between the two. One was giving me a bit of pain up under the ball of my foot; the other one a little but much less so.
I think size 10 in those is the right size but I'd be happy if the lining packs out a little and gives me a bit more room in the toe box. Should I expect them to pack out a bit and get a bit more roomy over time?
Just as an added note, I tried a Radar Carbitex Vapor boot on as well and it seems size 11 was the ticket there. I think that confirms what people are saying about going one size larger for the Vapors.
I can take anything apart