Marvel Spiderman Face - Dog Tee Machine washable. XXS - Miniature Chihuahua & Tea Cup Breeds - Back 7 - Neck 5.5 - Chest 12 XS - Papillion, Maltese, Miniature Dachshund - Back 9 - Neck 6.5 - Chest 15 SM - Shih Tzu, Bichon Frise, Pug - Back 13 - Neck 8 - Chest 19 MED - Schnauzer, Beagle, Cocker Spaniel, Shetland Sheep dog - Back 17 - Neck 10 - Chest 24 LG - Springer Spaniel, Keeshond, Pit-bull - Back 20 - Neck 13 - Chest 29 XL - Labrador Retriever, German Shepherd - Back 24 - Neck 16 - Chest 34