These beads are black and they are rectangles. They are 12 mm from hole to hole, 8 mm across and 3 mm thick. They have a flat center, while each of the four sides slopes away. The bead channel will accommodate up to a 0.5 mm cord. The finish is matte and seems frosted. These are vintage Czechoslovakian glass beads made in molds during the 1980s or early '90s. Price is for 10 beads.