They're from Peru. They're ceramic. They're hand painted. The hole is back to belly. A little over an inch wide, about 3/4 inch tall. PCB's - Peruvian Ceramic Beads. Some of the PCB holes will take a 2mm cord, some just close to a 2mm cord. Sold in units of 5 so to buy 10 choose 2 units, to buy 100 choose 20 units.