Measurement instructions: All bracelets are made in size ranges. Please measure your wrist and choose the size range closest to your size before adding the item to your cart. For an exact measurement, use a measuring tape. Make sure the measuring tape is firm around the base of your hand. Alternatively, you can use a string or strip of paper. Wrap it around your wrist, and use this length to measure against a ruler. Sizes displayed are in inches. Natural properties of the stones in this bracelet: African Opal: This is a calming, soothing and purifying stone. It encourages emotional healing and activates and stabilizes the heart chakra. It can be used to see all sides of a situation and surmise a variety of possibilities. It can cultivate creativity, insight and inspiration. Opalite: This stone improves communication on all levels, especially the spiritual. It removes energy blockages of the chakras and meridians. It helps emotionally by assisting during transitions of all kinds. It gives us the strength to express our hidden feelings. Lava stones: Grounding, for strength and courage, calming, and these rocks can be used as a personal essential oil diffuser. Simply add a drop or two of your favorite essential oil on the lava rock and rub it over the beads.