NACOCO Pet Clothes The Owl Sweater The Cat Dog Sweater Christmas Pet Jacket Dog Apparel Size X-SmallBack length 7.9 inches Chest length 11.8 inchesNeck length 8.7 inches Size Small: Back length 9.8 inches Chest length 14.2 inches Neck 11 inches Size Medium: Back length 13.8 inches Chest length 17.3 inches Neck 13.4 inches