| XS | 7″ | 12″ | Teacup and puppies under 5lbs | |
| S | 11″ | 14″ | Chihuahua, Pomeranian, Austrailian Terrier, Toy Poodle | |
| M | 15″ | 17″ | Pug, Maltese, Yolkshire Terrier, Jack Russel Terrier, French Bulldog, Boston Terrier | |
| L | 22″ | 20″ | Bichon Frise, Beagle, Cocker Spaniel, Collie, Bulldog, Schnauzer, Poodle | |
| XL | 28″ | 24″ | Springer Spaniel, Brittany Spaniel, Collie, Bulldog, Schnauzer, Poodle | |
| XXL | 36″ | 32″ | Labrador Retriever, Pitbull, Springer Spaniel | |
| XXXL | 38″ | 35″ | Doberman Pinscher, Golden Retriever, German Shepard | |