I am really interested in these boots, but I have a question about the sizing and fit. I wear a size 9.5. I called YSl and was told by their customer service rep that those boots run a little small and I should size up half a size(or a full size for wider feet). I've looked around online and seen differing posts on this, some say the same thing, while others say they are true to size or to size down. Does anyone know for sure about these boots?