Great Design, one ring have 5 sizes adjustable. You can choose favourite size to you. Material: Zine alloy. S: 30-40MM 5 Sizes adjustable 30MM/32MM/35MM37MM/40MM(1.18"/1.26"/1.38"/1.46"/1.57"). L: 40-50MM 5 Sizes adjustable 40MM/42MM/45MM47MM/50MM(1.57"/1.65"/1.77"/1.85"/1.97").
