I wear women's 10 1/2 or 11 medium.<br />I wear a 40 260 Milano Birkinstock. I wear a 41 273 Katika MBT sandal (10 10 1/2 M)<br />This shoe did not provide the width of the sandal (41 273)<br />To get a closed shoe I went to the men's 42  280 Amri which provides the comfort of the sandal.<br />Somehow MBT went narrow. A woman's regular is like a women's narrow.<br />A man's regular is like a woman's regular, even the heel fits well.<br />A guy who needs men's medium may need to go wide.