You'll be just about ok I think with that. I was on a 253 with size 11 boots last year with no problems.
If you're going as low as these guys you might have an issue, though ;-)
Snowboard carving technique: Extreme Carving Opus 3 - YouTube
If you're going as low as these guys you might have an issue, though ;-)
Snowboard carving technique: Extreme Carving Opus 3 - YouTube