Rustic Roundish Copper-White 9/16" Mottled, Rimmed Smaller Size Shank Button #SWC-92
The white and copper blend to make a silvery glisten. Imperfect, handmade look; the center scoops in slightly. Not quite 5/8" in diameter, with a shank loop opening around 2mm.
The larger, 7/8" size is #SWC-98