Truck Tire cock rings from Oxballs huge your meat with 2 different fits, the large one for a good grip on your cock and balls and good hard bone. The smaller one if you want more grip for rock hard meat. Or wrap your cock and balls with the larger ring and use the smaller ring stretched around ball sack for tons of grip. Made of super strong Skinflex TPR, the best material for strength and serious stretch. Stretched to 5 times its size. Inside the ring is a shallow channel. As you stretch the ring this flattens out so the ring stays where you put it. Large ring measures 2.2 inches wide and .75 inch tall with an inside diameter of .875 inch. Small ring measures 1.6 inches wide and .5 inch tall with an inside diameter of .7 inch.