SCARY over-sized. They don't offer half-sizes & the rule of thumb is to go up one. I'm 7 1/2 M so I ordered an 8. They're far more an 8 1/2 AND way too wide... So it's like a 8 1/2 W.  I don't trust the quality either. I think the heel would have rubbed but I didn't want to get penalized for wearing them so I tried one on, said no way & back in the box they went.