OmniPet Sunglo Reflective Ring In Center Dog Collar To find correct collar Length, add 4 inch to dog's exact neck size Safety collar, designed for hunting dogs the center ring allows the collar to roll over if dog becomes entangled Made in the United States with durable Metal hardware High visibility collar. Polyurethane coated nylon. Soil and odor resistant. Water repellent. Resists rotting. Easily cleaned Available in 7 colors! available in 5 sizes: 21" 23" 25" 27"