Hey small wrist, I wear the 2531.80 on my 6 and a half inch wrist. I work for a watch retailer here in Australia and occasionally, a customer will see it on my wrist and say; "It's a little large, isn't it?"
And I'll reply: "What are we talking about here?"
Just kidding!
My response to comments like that is always the same- if you are comfortable wearing it, then go for the larger size. At these prices, you should try to get as much steel for your money as possible. But you also have to like the watch and not be too self-conscious about it. If it feels awkward on you, then don't buy it.Bearing in mind that in recent years, the trend has shifted towards larger case sizes (check out the Glycine Airman-48mm! It would look great around my left thigh.)
I tend to find the mid-sized Seamaster a little too small for a sports watch. It has more of a dress watch feel to it.
I always tell customers "attitude is everything".
Besides, you can always do a few wrist curls. Seriously, it may just add a few mils to your wrist.
Good luck with your decision.
teeritz
P.S.- If you can afford the extra few bucks, go the automatic too. It'll outlive us all.