Shoes are definitely not a medium width, they are way too small to get on my mother's foot which they were ordered for or my daughter's foot either, they both wear a 7M, these Keen Uneek sandals are very narrow and so tight neither my mother nor daughter could get them onto their feet to even try on, definitely not a medium width. Could not get on anyone's foot to try on or check for arch support. We will be returning to Amazon.