Officially Licensed by the NFL - Dallas Cowboys Dog Football Jersey - Medium Officially Licensed by the NFL - Dallas Cowboys Dog Jersey Constructed of Breathable Micro-Mesh Polyester Features Official Team Number Font and Embroidered Logo on Sleeve Stylish V-Neck Cut Allows for a Comfortable Fit Medium fits Nape of Neck to Base of Tail 16" - 20"; Girth 16" - 19"; Neck 10" - 14".