Standard size: 24" (60 cm) will fit dogs with 22" (56 cm) neck size. For a smaller or larger one remove or add extra links. Measure dog neck size behind the dog's ears and under the jaw line. Collar size should be approximately 2-3 inches larger than dog neck. 1 link adds: 1.6" (4 cm) Dog metal collar with removable handle consists of steel prongs to train a dog to obey. A short metal handle allows to use this prong collar without a leash. Dog metal collar has a quick-release buckle. It's fast to put it on/off a dog. Steel prongs and metal buckle are plated with chromium to protect dog metal collar from corrosion. Buy dog metal collar with prongs and metal handle for better control while regular training with your dog.