I wanted to write a review on these shoes as it is very dificult to find shoes that fit properly. First off i think these are the most comfortable and supportive shoe i have ever had bar none. There is not much break in period a couple days and they fit like a glove. I have high arches and these shoes really provide great mid support/balance. First let me give you an idea as to the sizing by comparing another shoe i wear. One of my other favorite par of jogging or on my feet 12 hours a day (WORK SHOE) is the brooks glycerin15, in version fifteen I wore a 12M. Now just to show you how shoe size changes in the current brooks glycerin17 I had to get a 12.5W (wide). Because of the changing in size of the new brooks which i do have but do not like as much as the 15 I started trying different brands. The only other brand I found which felt great were these New Ballance 1080v9 but i found New Ballance shoes run extremely tight or skinny. So for this shoe my size is a 12XW or 124E, in this size they fit and feel better than any other shoe i have ever worn. I am 40 go to the gym 5 days a week, i have had back issues for 20 years which affects my running, walking, etc. These shoes definitely help, not cure, but help me get through the day. I stand all day because i have nerve issues when I sit which cause my feet to burn like fire so I started wearing these and my glycerin17 verse work shoes while at work and when i workout and between the two of these shoes they really help me get through the day. I highly recommend them. Side note, shoe brands change the way a specific shoe fits from year to year so the only way you will know if a pair fit is to try them on. When you find a pair which fit get as many as you can afford. I just baught my second pair and plain on getting at least three or four more pairs to put away as i hate trying to find good shoes that fit and these companies dont understand the concept of if it's not broken don't fix it or change a perfect shoe!!! And one other thing when it comes to your feet dont be a cheap ASS when buying shoes and get shoes that fit properly if you plan on being on your feet when you get older, or invest in a wheelchair now.Cheers!