I bought these for my son who runs 1/2 mile and one mile on the treadmill in middle school. He wears a size 12 but we ordered a size 12.5 and they fit perfectly. He says they're great. Our only complaint is that the bolt tensioner loosened a bit after tightening the first bolt, making it difficult to tighten the rest. He only wore them for a few practice sessions and one competition so I can't yet comment on how well they hold up.