It's a low-volume shoe.  My feet aren't wide or narrow, and these shoes are comfortably snug. When I would wear them with thicker hiking socks, they would slip more so I've taken to wearing more thinner running socks with them.  I did require a brief break-in period, unlike some other reviewers, but these are my first pair of tevas so perhaps I just wasn't accustomed to how tevas fit.  The shoes are sturdy, with a good griping sole, but yet still lightweight.  I would recommend them.