First off I have to say that this piece is a phenomenal find. The balls are hand made repousse and are seamed in the middle. They have a 13mm diameter and each panel is 1 1/8 in. wide. The weight is an astounding 170 grams. It lays absolutely PERFECT on the neck. By itself one might think it is radical with the total ball perched outward but when you put it on it translates to an awesome one of a kind rich look. It comfortably fits a size 16 in. neck. A masterpiece for a discerning collector. I think it is incredible that this piece has survived with this design of 20 balls and 40 barrels and hinges and to be in this completely sound condition is simply miraculous. Just, LOOK AT THAT NECKLACE!