Buster Collars: Sized in centimeters, referring to radius new quick and simple CLIC closing system. Makes the application of the collar as easy as buttoning your shirt. Fully transparent material, environmentally friendly 100 percent polypropylene. The newly developed material allows the animal all-around vision and animals can avoid walking into furniture, etc. Soft and flexible. Easy to apply to patient. Available in 9 sizes plus combo packs. 20cm