Authentic EFFY Diamonds Sterling Silver Bracelet fancier than Cartier's Oval Major diameter 2.8" Minor diameter 2.5" Will fit a wrist circumference of 7", although its exact oval circumference around is ~8" See, the problem is not that there is NO precise formula for the circumference of an ellipse, There is a great approximation by Ramanujan, etc. It does not open, so your hand must be tiny enough to go through it.. mine does not!! However you try it, it depends on the shape of your wrist, so 7" would be the safest bet, because Your wrist is more circular than this very eccentric bracelet In any case, believe me, it is fancier than the 750 gold oval Cartier bracelet with screws on it!! STAMPS ARE VERY SMALL, BUT A JEWELER WAS ABLE TO SEE THE FOLLOWING TINY MARKS: 0.25 CT FOR DIAMONDS, 925 FOR THE SILVER METAL, AND a tiny BH (normally a mark EFFY) Your satisfaction is guaranteed; if it's not a good fit due to its odd shape, or whatever, you should ask to return it for a full refund. I guarantee it to be described to the best of my knowledge and ability.