I have had several FitFlops through the years and love them.  I always tell people if they have feet problems they should get them.  My latest pair (3 years old ) need replacing so I bought these as they seem to be a similar style.  In most shoes I am usually a 9.5, but I looked at the pair I have and they said 9, so I ordered a 9.  Not only were they to small in length but width too, so even a size 10 wouldn't help there. SO disappointed. Also the Blue part of the sandal is low so if you have an arch at all I think its hard to get on (I DO NOT have high arches)  Maybe the material would have loosened up with wear. Seems like a very different shoe than the one made a few years ago