Here I can also take my ancestral size (44) - in other brands I often need a size larger. Whether here cut the Rieker rather long (but not very wide!) Or other brands rather short, I can not judge.
For people who live on a wide foot, these shoes are perhaps less suitable. Who has narrow feet, but will be very satisfied. For example, I tried Geox, which are for me but rather cut too short and too wide. 44 is then too short and 45 would fit on the length, but is a bit too wide ...