Dogs My Love Training Genuine Leather Pinch Martingale Dog Collar Studded 4mm Link Brown 3 Sizes Two in one - functional pinch martingale collar and aesthetically appealing leather collar with studs combination. Unique collar is made of genuine leather and trimmed with thick contrast color waxed thread. Riveted metal links are not removable. Features 4mm diam links heavy duty metal chain. Sizes specified in all the way opened and closed positions. Available in 3 sizes. For proper size please measure the circumference of dog's neck and make sure it is not less than "closed" position Very practical and easy to use. Strong and durable - great training solution. Limited closure ensures dog's safety Most suitable for Large/XLarge breeds. Please measure dog's neck before you order.