NACOCO TM The New Pet Clothing Dog Clothes Baseball Uniform Pet Clothes Spring Clothes S: Back 7.9 Chest 12.6 Neck 9.1 inches XL: Back 13.8 Chest 18.5 Neck 12.6 inches M: Back 9.8 Chest 14.6 Neck 10.2 inches 2XLBack 15.7 Chest 20.5 Neck 13.8 inches L: Back 11.8 Chest 16.5 Neck 11.4 inches