Spindrift's Buckle Martingale collar is a great training collar at a great price. The 1 inch tubular webbing makes this nylon collar not only incredibly durable, but a reliable training tool. The collar's soft, rounded edges are comfortable for your dog, and provide you with just the right amount of correction needed to prevent leash pulling. Sizing: Medium 17-20" Large 20-23" X Large 23-26" Made in the USASpindrift