This listing is for 25 13x16mm vintage Czech Uranium glass lantern beads. These beads glow under blacklight due to the Uranium used in making and coloring the glass. These beads glow brightly under blacklight. 25 beads is about 15 inches, enough for a necklace with spacers or a bracelet and several pairs of earrings. These beads are new and have never been used, but are old stock from the 1990's. There are 3 sets of these available in my closet. They are a beautiful yellow with a green tint. Thanks for shopping my closet, I ship quickly and pack my orders with care.