Hi DAHU, that looks like a 3 millimeter, I have the 7 millimeter in YG and Amber end pieces. The great thing about buying the David Yurman Cable Classics is that you can manually stretch open the bracelet up and squeeze close the bracelet to fit you wrist for snugness or looseness. The David Yurman Online Size Chart didn't help me because I thought one size would look great on me from looking at the size chart, but when I went into David Yurman on Madison Avenue in NYC, a different size looked better with the end pieces closer toward touching each other with about a half inch of gap from end piece to end piece. I can bend it for a snug fit or open it up for a looser fit without it hoola-hooping around my wrist from being too big or leaving indentation in my skin from being too small. If you go too small, it seems to look too opened up, and it feels and looks too weird. Also, if it happens to move around to wear the opening is on the knuckle of your wrist, it is very uncomfortable and it could easily come off and you will loose your bracelet. If you go too large, you can never get a snug fit if that is what you desire currently or in the future because the end pieces shouldn't be kissing each other and when they do, you have nowhere to go with getting it to fit any closer or to make it more snug. Too large, will spend more time squeezing it closed and it will catch on anything you encounter like clothing, a table, etc. and you will loose your bracelet and won't even know it because of the weight. You might have to find one at a Neiman Marcus, Saks, etc just to try on to see for yourself... or pick a size, and if you don't like, send back for another size. I have a size in mind for you, but I really think you should see and try on your options before committing.
"J!m"