Anyone Size up in these? I wear a 6-6.5 women's got ordered a size 6.5 and they feel tight. I don't consider myself to have wide feet, but they are a little flat. I can't imagine them stretching since they upper is synthetic and lined. At first, when I put them on they aren't too bad, but after a while my toes feel like they are going numb from being packed into tight. I am thinking of ordering a 7 or 7.5.