Good Plugin fun! Options are endless with this new toy! One side is larger than the other but designed that either side can be inserted. A hollow core allows fluids to enter or exit. Made from Platinum Silicone and has a super soft finish. Comes with a free storage case. Total Length is 230 mm or 9.05 inches. Large Plug largest diameter is 84mm or 3.30 inches. Smaller Plug largest diameter is 68mm or 2.67 inches. Fluid hole diameter is 31mm or 1.22 inches.