Cock rings are awesome. Flat out. The trick is to get the right size. You can measure yourself with the string technique or a tape measure. Once you get your right size then you can be more selective about what types. A properly sized cock ring can be worn for long term. I have some that I wear all day. I have some that I just wear while having fun. If you’re new to them try to start with a leather speed strap. It’s a cock ring made of leather with snaps on it. You can size it as you like, and it’s easy to take off. There are silicone rings, but for a keen trick go to your local hardware store and buy a number of various sized silicone o-rings. You can experiment cheaply and they’ll give you a sense of how to use them. The hardware store also has cheap steel rings, usually in the rope and tackle section. You can use those too if you want to cheaply try steel. The trick to solid cock rings is putting them on properly. You do it flaccid before the fun starts. One ball at a time, then pull your flaccid cock through. Taking them off is the reverse process, but you must be flaccid. If you are hard, it won’t work and you’ll hurt yourself. Speed straps are good because you can put them on hard or soft. Once you have gotten comfortable with the cock ring they are AMAZING. You’ll love how hard you get. It’s so awesome to hold such a hard cock.
I have a huge collection of rings. Couple of speed straps that I still use. I have a few silicone ones. I have many solid rings of a wide variety of materials. Steel, Silver, Copper, crystal, Rose Quartz, jade, wood, Tungsten Carbide (love the weight, but expensive). You can find exotic materials if you look for bangles. You can get glans and shaft rings custom made from some jewelry sellers once you know the right inner diameters. I really enjoy cock rings.