The 3/4-Inch Fanbelt Obedience Half Check collar adjusts for a neck size of 13-Inch to 22-Inch. It"s suitable for Dalmation, Spaniel, Doberman, Boxer, Staffie and similar sized Breeds. * Do not leave dogs unsupervised while wearing product * Woven reflective thread stitched into high grade nylon webbing on one side only * Chain Strength can take up to 921lbs direct pull * Suitable for Dogs weighing up to a maximum of 131lbs