It was difficult to purchase these without a size chart, so I did the best I can. I usually wear a standard 8.5 wide.  I wasn't sure what width to order and all the reviews said they run large. I agree with the other reviewers- I think I should have ordered an 8 because the 8.5 fits like a 9 in my opinion. Also, I traced and measured my foot and its exactly 4 in width and 9.5 in length.  The 4e fits great with plenty of wiggle room. I may have been able to get the size down in width but just wasn't sure.  Overall- they run large but felt very comfortable when I tested them out in the house.