They aren't really turquoise though, more of a medium teal color, but I love the way they feel on my feet! I've had a black pair of Granada style Birkenstocks that I bought 25 yrs ago and the cork is just beginning to break down. I've gotten lots of miles out of them and I still wear them around the house cuz they still support my feet wonderfully. I ordered a M. I have a very wide foot (EE) and they fit perfectly. I wish Amazon would make it clear on the sizing chart what exactly M and R means.