The stretchy Nitrile Cock Rings measure 1.5 inches, 1.75 inches and 2 inches in diameter. Choose to wear one or a combination of more than one (on the cock and behind the balls) for different sexual feelings. One thing's for sure, wearing these stretchy cock rings will improve the quality of your erection and make you harder for longer which is great news for both you and your partner. Available in Black.