Beads bracelets are made of natural lava rock stone and stone beads, lava stone often can helps to dissipate anger, suitable for stress relief, meditate, yoga, you can drip your favorite essential oil in it. they are good at absorbing oil and diffusing smell. All bead bracelets can be adjusted in length through the knot, and the internal length is 6.8 to 9.4 inches. sturdy rope make it has a large space for adjustable, the diameter of each bead is 8mm. it is a perfect bracelet jewelry for men and women, smooth and comfortable to wear and suit for most wrist sizes.