GenTle it is not about size per say , I am 5'10" with 8.5 inch wrist and I do not like 47s on I am also about 275lbs or so not doubt the watch doesn't look over powering. At 5.9 with a 7.5 or there about you can wear one there are skinny guys w 6.5 inch wrists sporting them. Looks like the Mad Hatter's watch on to me but to each his own, people think I am crazy wearing a 40mm Rolex on my arms. Buy a cheap one test it out ,it really is the only way.