Guardian Gear Double-Layer Nylon Dog Collar, 20-Inch, Blue;

This collar is strongest, providing protection and firm control over even the biggest dogs. 2-layers of tough nylon are stitched together and bar-tacked at the corners so they never wear out. Collars have all-metal hardware to stand up to hard use. Each collar is fully adjustable for a comfortable fit. All Guardian Gear collar is guaranteed for life. To determine the proper size, measure the circumference of pet's neck and add 2-inch. Best for large dogs. Available in blue color. Collar measures 20-inch length by 1-inch width.