I have a 17cm wrist, anything over 42mm diameter looks kinda bulky. I think ill exchange the Invicta and the Braun for another Casio, Seiko or i will try a Citicen watch. These watches were pretty cheap. The Seiko and Edifice were about 100€ each. Fossil~70€, Baby-G 40€ on Ebay, Invicta 50€, Braun 25€ from Aldi and the Casio A168 and the MDC field watch are about 20€ each. The last two are my most worn watches because the are really comfy.
The fact that you have this many watches means you're not a broke student