The new rings are call Xact-Fit. Now we make 14 Xact-Fit 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 Xact Fit ring is premium quality and incredibly strong. Each Xact-Fit ring is stamped with its size so no more guessing! Stack the rings for additional fun. If you if have favorite sizes you can order the perfect Xact-Fit size individually in the future. Cock ring size 1.0 inch length. 3.20 inches in circumference.