Metal double rings, approximately 3cm in diameter, set of 30. ✳️ There is a slight gap in the overlapping part. It's about 1 millimeter, so it's difficult to see, but please refer to the image. Because they are double rings, they won't come apart, but please refrain from purchasing if you are concerned. ◼️ The quantity can be increased, so please consult in the comments. Thank you very much for reading to the end. We hope you will purchase after confirming the above. If you have any questions, please feel free to contact us via message.