Adjustable Ring Base -- The standard size has an inside diameter of approximately 17mm and can be enlarged or reduced to fit your finger. These are adjustable and fit most ring sizes, so you don't have to worry about sizing up or down High Quality Material -- Our adjustable ring bases are made of high quality brass, light weight, easy to carry, strong and shiny, delicate and beautiful, reusable, can stand the test of time, and are a decorative addition to any kind of jewellery Beautiful Finger Ring -- You can wear these ring blanks directly or use them to DIY your own jewelry accessories, the unique claw design is also a fashion element that will make your overall look charming, elegant and beautiful DIY Ring Making -- You can add gemstones, cabochons, cameos, stamps, engravings, glue letters, logos, resin, or some small beads to the ring tray to create gorgeous rings or jewelry Perfect Gift -- This is a good gift for your boyfriends, girlfriends, fathers, bosses, coworkers as a gift for Christmas, Valentine's Day, Thanksgiving, Father's Day or anniversaries. It can improve your relationship and practice hands on skills