Color: Brown系 (Brown tones) Material: Plastic/Acrylic Stone: None Accessories: None The widest part is 1.3cm wide. The inner diameter of the ring is about 2cm. It's an open design, so I think it's a free size. It's not new. I've used it a few times. I will wrap it in bubble wrap and put it in a plastic bag. *I have a cat.*