These run at least a half size small. I have found Clarks to run kind of generously over the years, and they are often too wide for my foot, if narrow width is not available. In contrast, my usual size, 8M was both short--my toes bumped right up against the end of the shoe--and VERY tight around my foot. It was like having a rubber band around my instep. For reference, I have what is considered a fairly low-volume foot, so not filling up a shoe is a more common problem than having one be too tight. They are kind of cute, in a comfy shoe sort of a way. I think that if they fit they would make a nice flat for traveling for when you don't want to wear sneakers or clunkier walking shoes. They have very little arch support, but the insole is removable so you could add a custom orthotic or other arch support insole. They seem fairly well cushioned.