This is a 20th-anniversary ring from Martin Margiela. A diamond is embedded in the center. The previous owner had it resized, and it's approximately size 26, suitable for wearing on the thumb. The calendar tag has been removed during the resizing process. It's made of silver and has been given a smoked finish. Thank you. - Design: Silver ring with "M M 88" engraved in the center - Style: Classic design with decorations on both sides - Material: Made of silver Thank you for viewing.