Example of love rings. Pictured: Blush Stay Hard Beaded Cock Rings.
There are a number of different types of love rings on the market today. They are made from a number of different materials, including rubber, silicone, and even metal and leather. Some cock rings also have vibrating attachments which can be used to stimulate a clitoris or the anal entrance.
When buying a love ring, it's important to realize that they come in different sizes. A ring that is too large won't be effective. A ring that is too small can actually be dangerous.
If a love ring that is too small is left on for an extended period of time it can cut off the blood supply to the penis which would result in damage to the erectile tissue.