Do you remember the curtain hangers/rings I bought in a hardware store for €3.95? (See “DIY/hadware vs sex-shops and some food for kinky thoughts. Part I“). This is what they look like in “action”.
Such rings are ideal in combination with cock-sheaths. If the sheaths are “connected” to any other garment, the effect from cock-rings is more “pronounced” and useful, especially if you use piss-condoms (to prevent leakage), just like on the photos below.
As you can see, there are several ways of wearing cock-rings. You can combine different rings (different materials, different diameters, different widths, etc.) and even make a permanent construction by glueing rings together. Do not like the result? Just build a new one! The rings are very cheap!