About our gear: Our Biothane® collars are waterproof, stink-proof, highly-durable, soft to the touch, and feature vibrant color combinations! Best of all, a quick rinse under water is all it takes to get your collar looking new again. Because we demand the best, all hardware used is solid brass, meaning no matter how wild your adventures get, you will never have to worry about rust. Our collars are made to last. 🐶 Collar Sizing Guide: Small: 8-12 inches Medium: 11-16 inches Large: 15-20 inches XL: 20-24 inches Please be sure to double check your pup's collar size! Ensuring size is the responsibility of the buyer and we do not accept returns or exchanges on products where the wrong size is selected. To properly measure your dog's current collar, lay it flat and measure from the center bar of the buckle to the hole you use for proper fit. It's always best to measure twice just to be sure! NOTE: Small uses 3/4 inch webbing, while all other sizes use 1 inch webbing.