Imagine if a finger ring only came in three sizes corresponding to the circumference of a dime, a quarter, and a dollar coin. How would they fit? Until now, the sizes of cock rings were even further apart than these. No wonder it's almost impossible to find a well-fitting cock ring. We have developed the first cock ring sizing system designed to fit you without too much stretch, but with enough restriction to be truly effective. We had to discard the sizing system that had become the de facto standard. We realized we needed to make rings that are only 2.5 mm apart in size to achieve a perfect fit. The new rings are called XactFit. We now produce 14 XactFit ring sizes, while other manufacturers only offer 3 to 5 sizes in this range. We have made them not too stretchy, so the rings are effective but easier to put on and take off than a metal ring. Our fun Play Zone kit includes the nine most commonly used XactFit sizes for sheep rings, ball rings, and cock & ball rings. We know you will be surprised at how much this range of sizes makes a difference. The XactFit rings are made from plush soft-touch silicone and are of the highest quality and incredible strength. Each XactFit ring is stamped with its size, so you no longer have to guess. Stack the rings for added fun. If you have favorite sizes, you can order the perfect XactFit size individually in the future. The Play Zone comes with a storage cone specifically designed for the perfect storage of the XactFit rings. The complete set of available sizes is shown below. The Play Zone comes with PF size #11#19.