I am a great fan of Vass and have four pair, all oxford's. Two on U, two on F and all in same size and width. No doubt inconsistant in sizing. Mostly in terms of width (or more correct, cirkumferens), but there is also 5mm difference in length between my two pairs U lasted shoes. Roominess explained by "hand made, lasted by different persons".Love all of them but they do fit differently between them.