I have to order mens as I wear a womans 11.5 and few companies are kind enough to make them.  ALSO they are all sure if i have an 11 foot, I wear a WIDE width, even in womens shoes.  I have a VERY NARROW instep compared to most SO this shoe, which I do like, is wide enough for bigfoot and I can barely get it snug enough to keep it on.  However, I will be using it, as it is really light and protective, just have to put in a thick tongue pad.