The havaianas flip flops, differ in the same size.

I have the exact same ones in black, but there the 39/40 size is perfect. In these specific ones in gray, the same size has a larger fit, resulting in not sitting as well as the black ones. I tried the immediately smaller size in a store and it didn't fit well either (it was somewhat small), so I kept these. Just keep that in mind.

However, they are very beautiful, they sit like a jewel on the foot and are extremely non-slip