Size: The ring is distorted, and the actual inner diameter is 17.5mm to 18mm. If it weren't distorted, it would be 17.66mm, size 15. Condition: There are scratches that are difficult to see in the images. All items in the images are included. * The ring case is not included. * If you are hesitant about used rings, please look for unused ones. Please note that we do not accept returns for complaints or size issues after purchase. We hope you will consider and purchase the item based on the above information. That's all.