Coastal Pet 06601 A BLK20 Adjustable Dog Collar, 3/4-Inch, Black 3/4", Adjustable, Black Nylon Collar, 14"-20" Best suited for medium or average size dogs Made from high quality nylon that is specially processed to prevent fraying, and increase the overall strength All nylon products are carefully and neatly finished This collar is comfortable, appealing, and durable