I'll echo some of the other's reactions on the size. That style of case/dial already wears large, so I think I would scale it back down to the 42ish mm neighborhood.
Also, I like the open and clean look you're going for, so I would either cut the day/date window out totally or bring it down to a date only, and make it a black disc with white writing to make it blend in more.
With all that real estate, I feel like something more should be done with those numerals and the hands. Everything's just too thin. Experiment with font styles and sizes, as well as hands that might have a funky modern style that would fit the concept you're shooting for.
The straps are FANATASTIC!!!!!!! Don't change a thing about those!!!!!!
I'll agree with many here. A simple clean watch such as this should be about 39 mm to 41 mm. I do however like most of the dials and the clean and crisp presentation. Picture number one through three are subtle and restrained which I feel is a good direction for a watch like these. Good luck
I love it - especially the day/date. I'll never buy another watch without a day & date. I'm not sur where everyone here is getting their specs from, but I prefer 45-46 mm case; everything else seems to be like a ladies watch to me.