Nite Lite Premium Dog Gear, 1 Inch x 27 Inch, Ring-N-Center, Blue, Nylon Dog collar. Nite Lite nylon collars are constructed from two layers of strong nylon webbing. These durable collars also feature the canine buckle, curved to fit the dog's neck for comfort, and floating keepers to keep the collar ends in place. To select collar size: Measure dog's neck and add four inches. Example: 17 Inch neck will need a 21 Inch collar. About Nite Lite:Nite Lite was established in 1972 in Clarksville, AR as a family business and remains that still today. After Almost 40 years, we have been producing quality. Our lights and dog products are all made in our Clarksville, AR factory, which is nestled in the Ozark Mountains of Western Arkansas.