I have narrow feet, and I normally wear a men's 9.5, but in this shoe I wear an 8.5. Someone with wider feet probably wouldn't be able to size down as much because the fit is quite narrow. I also notice the shape is very straight, so someone with a naturally curved foot might find the fit a little uncomfortable. This one has a glued-in foot bed liner, so there is no removable insole in this one. I got these for the look, which for me is a perfect 5. It's something I can wear to almost any casual occasion. I would wear it more often if the shoe was as comfortable as most of my modern athletic shoes. Unfortunately it's not. The foot shape is not ideal, not just for my foot, but probably for most feet. The cushioning is good for short walks, but if I plan to be walking for a long time I'll pick a more comfortable pair of running shoes. Also, the upper is kind of harsh feeling and rubs my ankle in certain places. However, I know it's a classic shoe and the slight discomfort has to be expected. I also got it for a good price, so I'm happy with the purchase.