I have six and a quarter inch wrists. I tend to favor 36-39mm watches with excptions on either side. As with anything you wear i think it is about understanding what you like and what attributes you have and wearing things to highlight your best qualities. I have at times worn vintage or modern womens watches because the size is a better fit. But smaller is not always better. If a company just shrinks a larger watch often the proportions of the case and the dial look odd. Out and about, It is nice to see when people wear watches that fit them, their attire and their personality. But going beyond that is a fool’s errand.

I have skinny wrists and 38-39 mm is probably the sweet spot for me. But unfortunately they don’t have the seamaster that I really like in that size. So i wear what I have, because I like the look of the watch and even though its a bit bigger than I would prefer, its not a total faux-pax for a diver to be on the bigger side.

Until 2000s male watches used to be 34mm, chronographs included (check the magnificent Blancpain ones). Things have changed in the last twenty years, teaching the current, non sensical situation, probably to please vulgar customers who wanted to show off their expensive products. Therefore no worries and get a “woman” model if it fits you better.

I think it’s more about what you feel comfortable. For me I don’t give a shit what people think. I wear between 22 and 55mm, I had a few woman watches so I share wearing with my wife.