Optimize your experience with these silicone cock rings from Doc Johnson! The OptiMale Thick C-Ring Set offers enhanced size and girth with three rings in 40mm, 45mm, and 50mm diameters. These rings are ultra-stretchable for easy use around the shaft or testicles, maintaining those long-lasting erections you've always dreamed of, and prolonging your ejaculation. Phthalate-free silicone.