They're from Peru. They're ceramic. They're handpainted. Drilled side to side, neck to neck. Looks like a real bat, the kind that lays eggs in your hair. Roughly 1.25 inches wide, 1 inch high. PCB = Peruvian Ceramic Beads. Some of the PCB holes will take a 2mm cord, some just close to a 2mm cord. Hole is head to tail.