I purchased this ring a few years ago from a vintage clothing store that carries brand-name items for around 20,000 yen. The grooves have a darkened finish, creating a contrast between silver and black that gives it a rugged detail! It's one of the larger Atlas rings, so how about making it the centerpiece of your look!! Size: Approximately size 13 Inner diameter: Approximately 18mm Width: Approximately 11mm Thank you for considering.