Actual measurements: 3.5mm long, 5mm diameter. Price for one bead aligner. These bead aligners will prevent unnecessary movement when using large hole beads in jewelry designs, and keep small beads from disappearing inside the hole. This 6mm spacer bead has a tube on one side that is meant to go inside a larger bead to align that bead with the other beads. Made in USA by TierraCast from high quality lead-free Britannia pewter alloy, plated with precious metal of the highest craftsmanship.