I'm pretty sure we will not see 33 and 35 mm again. Ofcourse there will always be exceptions
But probalby less tha 15% of us would want to wear a 33 or 34 mm watch. I think everething between 39 and 42 is what we can call 'normal' size. Bigger watches between 43 and 46 will always have a place in the market but I do think we have reached a limit. 1 or 2 years ago several brands were making almost every watch in a 45mm or bigger size and that has stopped.
Brands like AP (the ROO) and Panerai can get away with it but we don't need 46mm or bigger JLC, IWC, Hublot
And the 60mm Egiziano .. well that was even 2 years ago a joke
I you like to wear a 31 mm watch, why wouldn't you
I wear whatever I want and I don't care what others might think.
I have got several vintage Pateks with incredible case designs and they all are pretty small compared to todays standards - but I do not care at all!
In former times it was an art to produce small and slim watch movements which were accurate enough and reliable even in small cases - much more difficult than building "elephants" like today...
I appreciate the art of the former days - although I have bought a bit larger (37mm) pieces in the last years too like a 5110 world timer which is a beautiful and comfortable size for me.
best
erich