The Nick Hawk Gigolo Stay Hard Rings from Cal Exotic Novelties. Nick Hawk... He's the star of the hit Showtime television series GIGOLOS, and a highly paid expert on what women want. Nick worked closely with us to create this complete line of pleasure products. Sturdy, stretchy, all purpose silicone rings. Made of silicone. 1.5"/3.75 cm (medium). 1.75"/4.5 cm (large).