Imagine if a finger ring only came in three sizes equivalent to the circumference of a dime and a quarter and a dollar coin how would they fit? Well until now, cock rings were sized even farther apart than this No wonder finding a good fitting cock ring is near impossible. Perfect Fit has developed the first cock ring sizing system designed to fit you without too much pull but with enough restriction to be truly effective. We had to throwaway the sizing system that has become the de facto standard. We determined that we had to make rings that are only 0.1 Inch, 2.5mm apart in sizing to get rings that would fit perfectly. The new rings are called XactFit. Now we make 14 XactFit rings sizes where other manufacturers make only 3 to 5 sizes in this same range. We made them not too stretchy, so the rings are effective, but easier to get on and off than a metal ring. We know you will be surprised at how this sizing makes all the difference. Made of a plush soft touch silicone the XactFit ring is premium quality and incredibly strong. Each XactFit ring is stamped with its size so no more guessing Stack the rings for additional fun. If you if have favourite sizes you can order the perfect XactFit size individually in the future.Size 14Dia. 1.4 Inches. Cirum. 4.4 InchesSize 17Dia. 1.7 Inches. Cirum. 5.3 Inches Size 20Dia. 2.00 Inches. Cirum. 6.3 Inches