Material: Titanium SteelUSA Size: 8，9，10No fading，No rust，No allergiesWearing Accasion: Dating / Daily / Wedding / Aniversary / PartyGift for: Men / Women / Brother / Friend / Mum / WifeFit for: Men，Women，Young and Maturity FemalePackage Included:1 Piecesize 5=diameter 15.8mmsize 6=diameter 16.5mmsize 7=diameter 17.3mmsize 8=diameter 18.2mmsize 9=diameter 19.0mmsize 10=diameter 19.8mmsize 11=diameter 20.7mmsize 12=diameter 21.3mmsize 13=diameter 20.2mm