These are size 44. I find the U last very similar to the Carmina Simpson last (that I happen to be wearing today). By the end of the day my toes start to feel a little squeezed. Quality wise, I don't see much difference between Carmina and Vass (at least the Vass pair that I have)Maybe Vass comes in different grades?The 43.5 F last shoes are still out there, tempting me!!!!