High-Quality Material: Made of 316 stainless collar, Hand Polished,18K Gold Plated. Gold Dog Chew Proof, Durable, No Rust, for years of use! It is very strong that can’t be pull it apart even with 680 lbs of force! Heavy Size:Wide:19mm(0.74inch),Length:16-26inch.The widest point around your dog’s Neck ,and add 0.5-1 inches for initial collar length for Adjustment. Design For Strong Dogs: Handmade Custom Personalized Metal Dog Collar for Large Dogs -Strong Steel Metal Links for Big Breeds - Rottweiler, Pitbull, Mastiff, Cane making this the perfect dog collar for large dogs Solid Steel Buckle: The buckle is made of solid 304L stainless steel, which is very strong and very convenient to use.