Gorgeous strand of lava beads, dyed black, in a pleasant lentil/donut shape with a center hole. We now offer these in two sizes: The large beads measure 32-33mm in diameter and are 9mm thick in the middle of the bead. (Like all lentil beads, these are thicker in the center.) There are 10 beads per strand of the large beads. The center has a drilled hole that is approximately 2mm in diameter. The small beads measure 20-21mm in diameter and 10mm thick in the center. The small beads have a 3mm center hole. There are approximately 18 beads on the strand of small lava beads.