Martingale Genuine Leather Dog Collar Choker Large to XLarge 21"-25" Neck, Cane Corso, German Shepherd, English Bulldog Soft, strong, durable, and light. Collars are measured 25" all the way open, it measures 21" 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 21"- 25" neck - Please measure dog's neck before you order