2mm gem. These have a 1/4" wearable, but it can vary up to 1/16" in either direction, depending on what our manufacturer send us. You can request a specific length at checkout, but we cannot guarantee we will have it in stock.
The martini shape is a more flat gem version. Rather than being round like a ball, the gem setting is more like a "U" sitting more flush against the nose. The gems are also bezel set in, not glued.