Like our side release collars, our martingale collars are designed for great looks and durability. They make a great training collar; a gentle tug is all you need to remind your dog when your friend needs it, no prongs required. They easily slip on and are adjustable to fit your dog's neck. We start with the same hand woven fabric used in all of our collars and leads, and finish with the same high quality nylon webbing and solid brass hardware that make our entire product line stand the test of time. We guarantee it. Each tail waggin' collar and lead is 100% colorfast making them machine washable. (Hang dry, please.) And, like all of our collars and leads, each one is hand sewn in the USA. small 11-15" medium 14-20" large 18-25" xlarge 23-30"