Our leather pet necklaces are a mixture antique leather and gemstones. We like to incorporate healing stones with style. The leather collars are fully adjustable fitting neck sizes from small 6"-12", medium 10"-18", and large 16"-26". Each one is hand made using the traditional macramé style weaving. Metal fasteners to close. These collars are to be used in conjunction with your dogs regular collar as they are not strong enough for walking or tethering. Also great for use on cats.