Our highest quality silicone is the result of a special casting process and a super-quality silicone that reduces hair stickiness. While the rings may not look impressive, they offer both mild and intense levels of restriction - simply add or remove the number of wraps. In each package, you will find an approximate number of wraps possible for each cable length to achieve functional restriction. Naturally, the larger the ring, the greater the available pressure area. During testing, our testers used all 4 sizes, and customers could choose all sizes in their play depending on their mood and circumstances - in other words, there is no right size. It all depends on what you want to achieve at each specific moment.