These are random weirdness that we decide to sell - whether it be because his office needs a tidy, he made some new stuff or was just playing. 1.6" diameter lens shaped painted wood disc. 0.070" thick at the edge, 0.2" thick at the center. 16ga hole near one edge. We recommend an 18ga 7/32"" hanging ring. 12 colors as shown - Mixed bag is a random assortment of each color. Discs can also be hand painted, hand engraved, etc.