Material: Crafted from Solid 925 sterling silver. It still keep bright and shining after used for a long time,high quality.The ring blank is stamped with a 'S925' mark. SIZ: can fit 20X20mm round cabochon,package:1PC USAGE:Use this ring blank to set your own raw stone or other stone to make your own ring! Adjustable:Fits any size while you wear these rings blanks comfortably on any fingers. GIFT-WORTHY:Jewelry is the perfect gift for the holidays, makes a sentimental surprise for any awesome lady. Great gifts for Mom or Grandma on Mother's Day, anniversary, birthday, or wedding celebration. 925 Sterling Silver Adjustable Ring Base Mounting 6 Claws Ring Blank Jewelry Finding DIY Gift for Friends,material:925 sterling silver, can fit 20X20mm round cabochon ,finger size:adjustable R7-9 ,package:1PC