Round button designed with natural bamboo sprigs embedded in black resin with a soft shine. 1" diameter square and about 1/8" thick. A bit of shine and a great design. Super durable, washable. Two holes. Color and size quite consistent, and the bamboo sprigs of course are all different. The backs are solid, flat, shiny black.  Another of our interesting bamboo and black buttons. 

These are the last 2 we'll have; the supplier has gone out of business.