The 1-Inch Lumberjack Obedience Half Check collar adjusts for a neck size of 17-Inch to 29-Inch. It"s suitable for Rottweiler, Ridgeback, Bouvier, Labrador 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 1219lbs direct pull * Suitable for Dogs weighing up to a maximum of 174lbs