These boots are 44.5 U but they fit much snugger than my 44.5 shoes. They are tighter in the toes and instep. I bought these from a previous owner. Since Vass does not mark the width, I believe maybe these are a narrower than normal width, E instead of F ????
Vass museum plum MTO from Ascot. size 43.5 - F last, maybe I should have gone 44. Very snug fit, good in the morning, gets tight by the end of the day. For comparison I am 9.5 in almost all Carmina and Lobb, 10 for Ed Green and G&G.