I have bought several pairs of Clarks shoes this month. I wear an 8.5M, or a 9N. Of 4 pairs of Clarks that I have gotten they are all so different in their sizing. This particular shoe is more narrow than most and tighter, (shorter). I have also had to get a 8.5N on one pair of Clarks because the medium width was ridiculously wide. I wish that the Clarks brand would be a lot more reliable. It is tedious to have to buy 3 or 4 sizes to get one to fit. As far as this shoe goes it is really cute, very trendy and stylish. The "embellishments" on the shoe make some noise when you walk. if you are a 8.5M you may want to get a 9M. The only reason these fit my foot is that they are narrow. Clarks are you listening??