Nice and wide, the Collar secures around the neck with a hardy, size-adjustable velcro strap. Completely detachable and featuring a swivel clip that can twist and turn a full 360 degrees and back, the nice long (32 inch/81.259cm) Leash clips securely to a big O ring set front and center of the Collar. Use together or with other compatible bondage gear- each piece can be independently enjoyed. Collar adjusts to fit most. Nickel free.