Sewanz Women's Elegant Sterling Silver Finger Rings, Diamante Double Rings Design Nail Ring Sewanz is a US registered trademark with the high quality. Size: Opening Free Size 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.