Our Tennessee Volunteers dog jacket, medium size, keeps your favorite four legged fan warm and shows support for your team at the same time. It is made of fleece with faux leather sleeves and pockets, rib trim and snap closure. The medium is for 16 to 18 inches back length measured from base of neck to base of tail, and 20 to 22 inch chest size measured across the back and around the dog behind the front legs. When measuring for proper fit, consider your pet's build, thickness of hair or fur, and growth potential. This item is submitted for production when ordered; please allow up to 14 days for it to ship out.