This design can be made any size by simply adding or taking out lave beads. The beads chosen to represent the chakras are: 
Crown(purple) is Amethyst, Third Eye(indigo) is Lapis Lazuli, Throat(blue) is Blue Lace Agate, Heart(green) is Green Jade, Solar Plexus(Yellow) is Citrine, Sacral(orange) is Carnelian, and Root(red) is red coral. The Black Lave adds the element of grounding and protection, and the Selenite bead helps keep the bracelet cleansed and charged. The OM bead represents the cosmic vibration that underlies all existance, it promotes a more quiet mental state, reduces stress and improves attention.