These heishi beads are made from natural shell. The slight variations in colors and shape of the beads will make them a fun addition to your beading project. Look carefully and you will see that each bead is unique. Individual beads measure 1-3 x 16mm with approximately 185 beads on each 16" strand. Use them as spacers or accent beads. The rustic character of these beads is sure to add an authentic touch to your jewelry designs!