Color Changing Necklace 19 Inches Long19 inch mood changing necklace of 3mm round thermo sensitive Mirage beads. This is a real mood necklace. The beads are hand made. Each bead approximately measures 2. 5mm by 3. 5mm with a 0. 5mm hole. The number of beads per color changing necklace can vary, but the two mood changing chokers I counted both had 208 beads. This is a very pretty and delicate choker. The color changing beads continuously change color, ranging from black (when cool) through