The good news first: Size 41 EU was perfect for my size 10 medium foot. Color (Limeglow) very cool and stylish for summer. Sandals are well made and very durable looking. Arrived quickly for a good online price.<br />Now, the bad: ONLY buy these if you know the Birkies will work for you!! This was my first pair, I bought them because of all the great reviews, but they don't work for me. I am slightly knock kneed with bad knees as a result. I have normal (neither high nor flat) arches. I am normal weight, in good shape, exercise regularly. These sandals very quickly give me knee, hip and back pain that lasts into the next day after wearing them! (They remind me of what used to happen from wearing over-hyped running shoes that were supposed to correct for everything, but were just wrong for my body.) ALSO, I live in Hawaii, wear thong sandals 365 days of the year, but can't tolerate this thong between my toes. VERY hard, stiff and unforgiving. If you might have any similar issues, I strongly urge you to bypass these sandals! For sheer.comfort and kindness to your body, try Oofos or Telics.