1.The collar is made of high quality PU leather. 2.Fashion design making your cat/dog/pet looks absolutely unique. 3.The length can be adjusted. 4.Collar size: size S, neck 8.5-10.5 in (22-27 cm), width 0.5 in (1.3 cm); size M, neck 10.5-12.5 in (27-32 cm), width 0.5 in (1.3 cm). 5.When measuring length, please set aside a little more, avoiding the pet feels uncomfortable because the collar is too tight.