I had no problem with the sizing, I just referred to the sizing chart on amazon and they fit perfect.  Brought these hiking on camel back mountain in phoenix.  I felt like a little gecko, my toes gripping easily as I leapt from rock to rock all the way up the mountain.  My girlfriend was so impressed, she went out and bought a pair a week later.  I don't care if they aren't fashionable, they are so comfortable and efficient.  Five stars!