Too tight in the instep--rubbed the top of my foot raw.  Needed to replace my old pair of Haflingers which I loved but wore holes through.  The new pair in size 40 were much tighter all around than my old pair in size 40.  Actually hurt the top of my foot because they were so tight.  Going to keep them and see if they will stretch since they are wool--maybe try to get them wet.  Otherwise disappointed that the sizing is so different.