Size: 14mm Thickness: 2mm Post: 0.7mm Weight per piece: 0.6g I'm selling these because they were a bit difficult to put on and take off, so they weren't suitable for frequent removal. They are unused and have no noticeable scratches or stains, but they are still pre-owned, so please understand. There is no hallmark, but I believe they are definitely silver 925. I think those who own silver accessories will understand the color and how they tarnish, but if you are unsure, please refrain from purchasing. There are three, but one has a slightly shorter thin part and is prone to falling out, so please consider it as a bonus. The items in the photos are all that are included. I am also happy to discuss the price or answer any questions you may have.