blomman Mr Blue
38586
Interesting topic, Baron!
But I would say that optimal size is not only diameter.
It also involves the ratio of how thick a watch is.
A 33 mm watch may feel too big if thickness is too big and a 44m watch may feel small if too thin...
38.5 x 11.5 mm is a good ratio.
But that is not all, case- and especially lug shape plays a big role here!
Best
Blomman