Size unknown. Fits on an adult male's thumb. Approximately 21mm in diameter. Ravish Rucy Grass Line Ring M RKR-1 Silver 925 Price: ¥23,100 (tax included) A brand produced by RATRACE, which consistently releases high-quality accessories. Inspired by plants such as lilies and arabesques, the brand pursues the ultimate beauty of curves in all aspects, such as natural curves, elegant curves, and curves that even exude sensuality. This silver accessory brand is created with a conscious focus on these elements.