When you want a big accent piece, this is a great bead. It is a double diamond hexagon. These are vintage Czechoslovakian glass beads made during the 1980s or early 1990s. They were made in molds, but perfectly finished with no mold marks whatsoever. The bead channel will accommodate a 0.5 mm string. The beads are smooth and a shiny black. The bead is 14 mm at the widest point and 4 mm at the narrowest point. Price is for 10 beads.