There are several types of penis rings available, each with its own features and benefits. Here are some common types of penis rings:

1. Basic Silicone or Rubber Rings: These are simple, stretchy rings made from materials like silicone or rubber. They are easy to put on and remove and are a good option for beginners.
2. Adjustable Rings: Adjustable rings allow you to customize the fit to your comfort. They often have snaps, Velcro, or other mechanisms to adjust the size.
3. Vibrating Rings: These rings have a built-in vibrating component that can provide additional stimulation for both the wearer and their partner. Some vibrating rings even come with remote controls for more convenience.
4. Double Rings "Cock and Ball Rings": Also known as Cock and Ball rings, dual rings or double-loop rings, these designs include two rings—one to be worn around the base of the penis and the other around both the penis and the testicles. This can enhance the sensation and also help maintain the erection.
5. Metal or Hard Material Rings: These rings are made from materials like metal or harder plastics. They don't stretch like silicone or rubber rings and provide a firmer constriction. However, they should be used with caution, as they may not be as comfortable for extended periods.
6. Cock and Ball Rings: These are designed to encircle both the penis and the testicles separately, providing a different sensation and potentially enhancing pleasure for both areas.
7. Cock Cage or Chastity Rings: These are more elaborate devices that not only function as a ring but also encase the entire penis, often used in BDSM or kink scenarios.
8. Weighted Rings: These rings have added weight, which can create a unique sensation during sexual activity.
9. Cock Ring Sets: Some kits include a variety of rings in different sizes, materials, and designs, allowing you to experiment and find the most comfortable and pleasurable option.

When using any type of penis ring, it's essential to prioritize your comfort and safety. Start with a size that feels comfortable and never wear a ring for an extended period or if you experience any discomfort, numbness, or pain. If you're unsure, it's a good idea to consult a healthcare professional or sexual health expert before using a penis ring.