These are smooth round hollow beads made of sterling silver.

They have generous-sized holes to accommodate thicker cording.

2mm - 0.035" hole

2.5mm - 0.040" hole

3mm - 0.04" hole

4mm - 0.067" hole

5mm - 0.06" hole

6mm - 0.071" hole

8mm - 0.078 hole

10mm - 0.1" hole