Size Queen 12 inch/30.5 Cm - ClearA product that is perfect for the discerning individual, the Size Queen 12 inch is sure to meet your needs. With an enormous size of 12 inches (30. 5 cm), this firm and life like beast will give you all that you can handle. Even for a Size Queen. A realistic head and veins ensure that this feels exactly like you desire. The sturdy suction cup base allows for anchoring to any flat, nonporous surface,like a chair or shower wall. The 12 inch shaft (14.