Puppy-league&reg; Pu Leather Solid Pattern Single Rows Bullet Nail Studded Dog Collars Chain for Pet Dogs Chihuahua Material: 100% High quality PU Leather. Size(length * width): XS (1.5*30cm), S (1.5*37cm), M (2.0*42cm), L (2.5*51cm), soft and eco-friendly. Spiked Studded Bullet Round Nail Collar. Light, elegant and not stiff. Fashionable and personalized designed for small/medium pet puppy. If have any idea, please feel free to contact us for anything we will reply in 24 hours.