These blue color 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 1-2 x 3-4mmm with approximately 400 beads on each 24" strand. Use them as spacers or accent beads. Take note that the length of these strands are longer than usual. The rustic character of these beads is sure to add an authentic touch to your jewelry designs!