Birkenstock Sandals Arizona BS. BLACK. REGULAR FIT. Size 40 MM 260. UNISEX *Suggest you MEASURE YOUR FEET and find your Birk size. These say US ladies 9 but I would say they are more like a 10/10.5 in Men's, so a ladies 11.5?? (they fit my husband that is between a men's 10 and 11). My daughter was pretty devastated these didn't fit (dramatic, lol) so I wouldn't want that happening again. Especially since she saved up her money to buy them. The box showed up damaged but the shoes are brand new, only tried on by my daughter unless they were tried on at the store 🤷‍♀️ *Another size comparison, my daughter is a 9/9.5 and when we measured her on the chart, it says she should get an MM 245.