These stoneware beauties are hand made one at a time in traditional Korean style by a ceramic artist in New York State. No two are exactly alike, as you can see. The glaze has a bit of a sheen. They match the smaller 11/16" size. 
1" diameter or a bit larger, and about 1/8" thick.  $3.25 per button.  

Semi limited supply: once we run out, it may take a while to get more since these artisan buttons are made to order, by hand.