This one measures 5mm round. These are a flat faceted transparent disc shape. These are from the early 1900's and were produced in Bohemia. Glass nailhead beads were used in the days of the flapper to embellish garments before sequins were developed. The image does not do these justice. The old glass has a beautiful luster finish and the color of reds is amazing. You will receive 24 beads per lot.