Billow 2 Rows Studded Spikes 20-22'' Large Faux Leather Dog Collar (Pink, L) There are 5 adjustment holes, please compare with below size before confirm order (please allow about 1cm measuring error) Size M: Total length 1.3*20"(3.2*51cm), suitable for neck size:14.6-18.5"(37-47cm) Size L: Total length 1.3*22"(3.2*56cm), suitable for neck size:16.5-20.5"(42-52cm) Nickel-plated hardware, fashionable punk style looks very cool Made of faux lether. Package includs: 1*pet collar