Go a size up. I wear a 7 and bought a 7 because I have previously bought 7.5 in other flats from here and the strap was very wide. My whole foot could go thru. Anyways go a size up in these. The strap is very small. The whole thing is small. Love the detail. I have to glue the fabric down to a strap part that goes on top of the foot. It separated. Other than that it’s cute