Dogs My Love Real Leather Brown Spiked Dog Collar Spikes, 1.6" Wide. Fits 19"-23" Neck, Large Breeds Mastiff, American Bulldog. 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 27", will fit 19"-23" neck 1.6" wide 3/16" thick genuine leather 4 metal enforced adjustment holes