These awesome rings have a bezel setting so the button sits inside the bezel, they look divine!! Lovely silver plating, nickel and lead free. Adjustable ring band. Fits a 12mm flat back button or 12mm glass cabochons perfectly. You can also fill with resin. Comes in a pack of 10. There is also a 50 pack. *We have 2 choices of Silver, standard or extra bright and shiny... if you have a preference let us know at checkout.