| International Size | Breed of reference |
|---|---|
| XXXS | |
| XXS | Toy Poodle [Neck 6.7"] |
| XS | Chihuahua [Neck 7.9 "] |
| S | Yorkshire [Neck 9.1"] |
| M | Maltese [Neck 10.6"] |
| L | Pechinese [Neck 12.2"] |
| XL | Fox Terrier [Neck 13.4"] |
| XXL | Beagle [Neck 15.4"] |
| XXXL | Dalmation [Neck 16.9 "] |
| 4XL | Boxer [Neck 18.5"] |
| 5XL | Labrador [Neck 20.5"] |
| 6XL | Bloodhound [Neck 23.6"] |