The product description 1. Thin Blue Cord Dog Collars: These thin blue cord dog collars are made of durable polyester that is impossible to tear. Sturdy plastic clips secure the collar to the dog’s neck. Metal D-rings provide a secure connection point for your belt. 2. ADJUSTABLE SIZE FOR ANY DOG: From Shih Tzu to St. Bernard, we’ve got you covered. Please refer to the size sheet in the picture to get the best size for your dog. 3. We don’t want your dog to be our billboard, so we put our brand on the package, not on the collar. 4. It can be used for many occasions, like wedding, take photo , birthday parties, travel, celebrate and so on