The Tri-Rings cock rings come in three different sizes, aimed to fit any male from medium to extra large. We got the white Tri-Rings which don't happen to only be white, but were also glow in the dark! We weren't expecting them to glow in the dark, seeing as it doesn't advertise that anywhere in the description that I could tell. It didn't bother us though.
The rings are made of a semi stretchy rubbery material. Which makes it pretty universal for the user, whether the penis is a small, medium or a large medium, the medium ring will work and fit snugly. There aren't a whole lot of instructions with the cock rings and we had never used one before, so it was quite comical trying to figure out exactly how it was supposed to be used.
The Tri-Rings cock rings didn't work very well for my husband. It actually seemed to make him climax faster instead of prolonging his climax. He did say that it felt like the ring made him cum stronger, but we were both disappointed with how fast it made him cum. We wanted to prolong sex... not speed it up.
The packaging they came in was a little bit different from the picture shown. They came in a plastic clam shell type bubble pack. The rings were wrapped in plastic inside the bubble enclosure. The package doesn't offer a whole lot of instructions on using the rings but it is pretty easy to figure out. These are in no way discreet. It has a picture of a guy on the package with a hard on; he isn't naked though. The rings are also proudly displayed.
Overall, the Tri-Rings are affordable and a great idea, and I am sure that they must work for someone. That someone apparently wasn't us and we won't be using the Tri-Rings again, but we're glad that we gave them a shot. After all, you don't know how they will work for you unless you try them.