I have an 8 in wrist and I was wearing a watch with a similar case, and it looked a bit too small. I'm used to 42 - 44 mm watches. So, for you, I think it will be ok. I gave the watch to my daughter's boyfriend, so I cannot show you how it looks. But he has a smaller wrist than I, and it looked good.
By a watch I meant a wristwatch. Let me explain.
99.99% of us are carrying a pocket watch with us. Some people call it a phone. I call it a pocket watch that allows texting and internet browsing.
These days, on a cruise you are pretty much required to have the pocket watch I mentioned above. Most of the eating times, menus, entertainment, your bill are all available using that device.
When you go on shore, you also most likely to your pocket watch, so a wrist watch becomes redundant.
So, you do not need a wristwatch on a cruise. You may want to have one, or two (my usual case), or even three. But that is different from needing it.
Yes, if you swim in Lake Geneva, where the waters are calm, you most probably will not encounter a problem. But, if you go into an ocean, with waves, the water pressure could be above 5 bar even near the shore. I do not think it will be a problem, but better be safe than sorry.
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