AshopZ Dog Neck Collar w/ Adjustable Buckle Closure Measurement:XS,S,M Measurement: XS Length 20" Width 2" (Circumference 16.25"-19.25") Measurement: S: Length 22" Width 2" (Circumference 18.25"-21.25") Measurement: M: Length 24" Width 2" (Circumference 20.25"-23.50") Item Material:One Side Genuine Leather and Other Side PU Leather,Metal Spikes