how do you measure your wrist ? i never measured mine till just now...pull out a rope, wrap it around my wrist....take it out and pull out steel ruler and measure....huh , mine is like 6" 9 and half.close to being 7". No wonder i can get away with 51mm easily as compared to your guys....
A few years back i guess my wrist is smaller. I had a 44mm and it looked big on my hand, nowadays, 44 seem on the small side whilst 47mm look normal. 51mm is ok.
Guess i have quite a big wrist ? should cut down my diet....hahahahah