Green patina and brass (plated) Bali Style charm has detailed, dimensional tiny scrollwork.  These delightful little metal buttons are hollow and very light, with a shank on the back. They're almost like tiny bells. One doesn't jingle, but two or more when they touch, do.  1/2" / 12mm.  Shank opening around 1.25mm.    These may be the type used in costumes for belly dance.  $1.20 each.