Martingale Genuine Leather Dog Collar Choker Medium to Large 16"-19" Neck, Pitbull, Amstaff, Boxer Soft, strong, durable, and light. 1Collars are measured 19" all the way open, it measures 16" in closed position Made of high quality leather and chrome plated steel for durability and resistance to rust and tarnishing Width: 5/8". Trimmed with thick waxed thread. Will fit 16"- 19" neck - Please measure dog's neck before you order