This is a glass ring with a circular design that I purchased a few years ago from Piroo by Petit Coquin. The glass part is a flat circle with liquid inside. The diameter of the circle is about 2.5 centimeters, and the liquid is yellow-green. (I've placed a ruler in the photo, but please consider it as a rough guide due to the distance and potential misalignment of the markings.) The ring size is free size and adjustable. I love it and think it's very cute, but I don't wear rings often, so it's been sitting unused and I've decided to sell it. I hope it goes to someone who will cherish it. The ring part has many small scratches, but the glass part doesn't have any noticeable scratches. Please consider this as a used item, and only purchase if you understand. I will wrap it securely with bubble wrap and ship it via Yu-packet Post Mini. Ring Ring Accessory Glass Ring