tsr665802540 wrote an answer about Six Six One Race Brace Pro - Ankle on July 18, 2012
they seems to start in child sizes. i have like a size 9 male foot got the small and medium and they were both too small so i'd probably go large for most adults med for younger teens and so on... but i have a pretty big heel. the side plates will just hurt the shit out of the bone that sticks out at your ankle when the brace is tight unless it fits in the hole they put in the side plate to avoid that. so the size of your heel will also affect where that hole sits.