5 pcs Oval Small massage stone, 1.5 in 1 in. 2 pcs Round Large massage stone, 3 in 3 in. 2 pcs Oval Large massage stone, 3 in 2.5 in. The essential oil phase auxiliary hot stone, with the deepest massage, promote blood vessels and lymphatic obstruction body parts of the blood circulation, eliminate swelling and reach fitness goal.