Mr. Clippy Small Removeable Cat & Small Dog Pet Tag Clip Ring Silencer Holder For Cat Collars & small & medium dog collars Secure spring loaded clip to ensure pet tags do not fall off from collar. Perfect for removing your pets tag's to eliminate noise at night from tags hitting together Easily transfer tags to another collar - Clip Measures 24mm x 18mm collar & tags not included! clip and ring only. This clip will not fit large dog collar hooks.