I normally wear a size 12 dress/casual shoe and a 13 athletic shoe. I've worn all the common ASICS running shoes (Kayano, Nimbus, Cumulus, GT-2XXX, etc.). These Noosa Tri 8's are a quality shoe, but they are about a half size too short and a little more narrow in the toe box and middle. I actually liked the feel in the middle, but there's no way I could run in these without hitting  my toes on the front. Returning immediately.Oh, and while these are garishly colored, I think they look great in person!