If you order an extra wide size, you will need 1 inch less than your actual size. I found out about it after ordering and trying on 2-3 pairs. My wife and I used a similar model. We are big Skechers fans and my wife and I have many different models at home. The biggest downside we found with this model is the uncomfortable use as your feet tend to slide in and press on the front insole when wearing and walking, which is very frustrating.