Dogs My Love Real Leather Black Spiked Dog Collar Spikes, 1.5" Wide. Fits 17"-21.5" Neck, Large Breeds. Strong and durable genuine leather. Light, elegant and not stif Nickel-plated hardware and heavy duty D-ring. Trimmed with thick contrast color waxed thread. Overall length 25", will fit 17"-21.5" neck 1.5" wide 3/16" thick genuine leather 4 metal enforced adjustment holes