This is the first real pair of Birkenstock shoes I've bought. I originally bought the US size 7, as that is what I typically wear but they were too big so I exchanged them for a smaller size (US women's size 6) and they fit perfect-these may run a little big. Just an FYI but other than that they're great! It does take some getting used to such a high arch but my arches are very low so they need some help and I think these shoes are going to do the trick. I bought the (hot pink) and I love the color, really cool for the summer. I would recommend these to anyone needing some serious arch support.