saucony in general runs large, meaning I usually wear size 10.5 or 11 shoes, but with all of my saucony shoes, I wear 11.5; they are consistent across their entire line in terms of sizing. Definitely I'd recommend trying shoes on a store before ordering online. in regards to this shoe: beautiful! it is a perfect fit and feels very different from typical trainers; I'm using these shoes on trails and also in order to run on my forefoot instead of my heel; these shoes look fast and run really fast. the black finish is really slick and I get compliments on these all the time even if I wear them in non-running situations. there is encapsulated reflective camo elements all over the thing; the shoe is easy to get in and out of, and you just feel powerful as soon as you put them on. haven't run any races in them yet.