that you say it is one of your dream watches so I am wondering what the other dreams watches are and is size important to you. For me if you love a watch, buy it and do not care too much what others may think. I have a larger wrist than you (6.25 inches) but for me and I have tried the 5712, the watch is a little large for me. It looks a tad large for you too in my eyes but again as I say, we all have different criteria when choosing a watch. I think 40mm based on the above photo is probably the largest size that a 5.75 inch wrist will fit. It is my favourite Nautilus by far in the current collection with the 240 movement looking a lot better than the 324 movement. But the only Nautilus that I really did like, and I am still kicking myself daily for not buying me when it was available, was the 5800 produced only for 3 years (2006-2009) and sporting the rare 330SC movement with a diameter of 38mm. sigh.....