This is TOTALLY a matter of personal taste.
I have a nearly 8" wrist and am totally comfortable in anything from 36-52mm. Some guys with 6.5" wrists love the 48mm Pams and others with 8" wrists won't go bigger than 45mm.
Wear what you like.
Thank you i have ordered Omega Seamaster Planet Ocean Crpo 42mm my first rep.... i hope i do not regret it...
I will make a review when i will receive it.
Wait & See