Alloy Three Skull Head Charms and 8-9 mm electroplated lava rock stone beads are strung with a black adjustable cord. Inner length about 8 inch can be suitable for men. You can drip your essential oils or perfume to the lava beads, after absorbing the scent always around you. Great gift for Birthday, Party, Boyfriend, Fathers day, Christmas, Valentines Day, Anniversary etc.