Hook for anal and vaginal use with ball of 30 mm. The hook itself is from ring to ball: 34 cm long The wire thickness of the metal: 0.8 cm The ball is round and is fixed. The ring is flat and has an outer diameter of 3.5 cm and an inner diameter of 2.4 cm. This same hook is also available with a 40 mm. diameter ball, this item has order number #7809