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: Howlite (white): Known to reduce anxiety, tensions and stress. This stone can be used to facilitate awareness, encourage emotional expression and assist in the elimination of pain, stress and/or rage. 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.