Sewanz Women's Sterling Silver Finger Rings, Constellation Leo Opening Filigree Nail Ring Sewanz is a US registered trademark with the high quality. Size: diameter: 1.6cm Weight: 3g Material: Sterling Silver Opening adjustable silver finger ring,suitable for wedding,party,brithday's gift,etc. Sterling silver may require cleaning from time to time.Silver Polishing cloths are an excellent choice for cleaning your sterling silver jewelry.