This dog collar is perfect for Law Enforcement Supporters and dog lovers. This Thin Blue Line collar is great for walking and training pets. Woven from high-strength nylon material, the dog collar is durable and lightweight, which allows you and your pet more comfort and freedom. Let your best friend show their support for the men, women, and dogs that walk the thin blue line! Thin Blue Line AM-CR-LG. Style American Flag with Blue Stripe. Large (Dog's Neck: 16.5"-24.5", Collar Width: 2.5 cm. 12" Diameter. Premium Quality, Neoprene Lined for Comfort.