I haven't worn them, only tried them on and they were narrow from the moment I slipped/pushed my feet into them. I wear a size 9 medium and the length is almost too short as well, makes me look like I am wearing a pair that is too small for my foot.  I love Reef flip flops and bought these specifically because I love Reef, will buy Reef again, but these are definitely small and narrow.  Quality is fine, just small.