The Klippy is One Size Fits All (max 11/64-inch D-ring, the diameter of the D-ring on most large collars).
The Klippy is compact and versitile design working perfectly for cats and dogs of all sizes. Find other uses for it too: easy key ring transfer, quickly change children's ID's from jacket to jacket, etc.
It is made of lightweight and sturdy aluminum, anodized Silver or Pink, and comes with a split ring attachment. (Sample tag and collar in picture are not included.)