Just got back from my try-on appointment at the Apple Store. I ordered a 38mm sport last night after thinking that my tiny wrists (probably ~145mm, maybe even a touch smaller -- haven't measured them) would look ridiculous with a 42mm sport watch after seeing some pictures of other people wearing it. However, after the appointment, I can confirm what other people are saying -- pictures are VERY misleading. The 42mm looks chunky and ridiculous on my wrist in pictures, but in person at the store it looked just fine. If there weren't a 2 month + wait time, I'd be canceling my 38mm and ordering a 42mm instead; I think my personal preference tended toward interacting with the big screen, even though I only got to see the demo loop. (This is also why I have a 6+ iPhone instead of a 6). THAT SAID, I don't think the 38mm looked 'feminine' or 'too small' -- I think it's just a different style. I saw a few other men of various sizes at the table trying on the 38mm version, and it looked fine on them as well. Long story short, I don't think it breaks down to a male version vs a female version -- unless you fall at one of the extreme ends of the spectrum, there's not necessarily a wrong choice between the sizes EDIT: also, in case anyone is wondering, the watch feels very light, and I liked the sport bands a lot (WAY more than I thought I would). They feel very high quality -- silky to the touch -- and seem very comfortable to wear, especially compared to the FitBit bands. The screen quality is also FANTASTIC.