These soft, yet durable collars are adjustable and come in both brass, or satin nickel hardware. Available in 2 different widths – Junior (9/16″) and Standard (1″). Junior puppy collar: 9/16″ x up to 12″ and 9/16″ x up to 14″Standard: 1″ x up to 18″, 1″ x up to 21″ and 1″ x up to 24″