STRONG & STYLISH - Our dog collar is made of ultra-strong, lightweight Stainless Steel metal which will never rust or tarnish and maintain it's polished finish for years of regular use.COMFORTABLE & IRRITATION FREE - Stainless steel will never irritate skin and the smooth chain will not pull out your dog's fur, keeping your dog happy and comfortable!BEST COLLAR - Swagger Necklace 316L Stainless Dog Collar makes your dog look badass and fashionable, but is strong enough to control a large animal.This collar is suitable for Tibetan Mastiff, Neapolitan Mastiff, Pomeranian, Golden Retriever, Anatolian Shepard, French Mastiff, Great Pyrenees, Leonberger, St.BernardSize Measuring: Please use a soft measuring tape to measure the circumference of the dog's neck or the widest part of the head. And the dog chain is better 3-4 inches longer than the dog's neck size. For example: the dog's neck size is 18"/45CM, the suitable dog chain size is 22"/55cm.There is 1-2% difference according to manual measurement.