Excellent Quality. Made in USA. Bottom shank of the ring has been specifically designed against wear. This is a puzzle ring that will last forever! Each band is made of solid sterling silver. It measures 14 mm on the face and 7 mm on the bottom. (It is not Hollow or Plated).Available also in YellowGold, White Gold, Tricolor Gold, or in Platinum . This is one of the most difficult puzzle ring to put back together.