The Neoprene Snap Cock Ring from Perfect Fit. This adjustable cock ring is made of stitched and lined neoprene for ultimate comfort. It features safety snaps so you are not exposed to sharp edges. Also it stretches for that perfect fit every time. From the biggest to the smallest of the 4 snaps. The following measurements are the inner diameter: 2.25 inches, 2 inches, 1.75 inches, 1.5 inches. Full length is 8 inches.