These Super Soft silicone c-rings are broad for comfort and safety. A c-ring holds the testicles down and keeps the testes from contracting thus slowing down ejaculation. The ring is stretchier than standard Tantus C-rings, so it is easier to put on. Great for beginners, too. You don't need to put it on before an erection occurs; the silicone is stretchy enough you can put it on anytime. Easy To Clean, Eco-Friendly, Hypoallergenic, Hygienic, Boilable, Bleachable and Dishwasher Safe. Length is 4.75 in., diameter 1.5 in.