Light Steel Alloy weighing 5.1 oz. One of our best sellers. First ball at widest is 18mm/0.7", second ball at widest is 30mm/1.1" third ball at widest is 34mm/1.3" and tapers down to 11mm/0.4". From top of small ball to start of J is 153mm/6". From top of circle down to J is approx. 8".