Rhinestone Cat Collars Glimmer and Shine! A sparkling row of rhinestones adds a touch of class to these nylon collars and gives any cat a glamorous look. Adjustable 3/8"W collars adjust to fit necks 8"-12". Black plastic safety buckles breakaway if collar becomes snagged. Includes a color-coordinated jingle bell. Rhinestone Cat Collars are available in the colors listed below.