| Collar Width | Neck Size | Example Breeds |
|---|---|---|
| Standard — 20mm | 20–28 cm | Chihuahua, Yorkshire Terrier, Maltese, Toy Poodle |
| Standard — 20mm | 24–32 cm | Jack Russell Terrier, Miniature Dachshund, Shih Tzu |
| Standard — 20mm | 30–38 cm | Cocker Spaniel, Beagle, French Bulldog (smaller individuals) |
| Standard — 20mm | 35–45 cm | Border Collie, Staffordshire Bull Terrier, Springer Spaniel |
| Standard — 20mm | 40–50 cm | Labrador Retriever, Golden Retriever (slimmer individuals), Boxer |
| Wide — 30mm | 28–35 cm | Whippet, Cockapoo, Miniature Schnauzer |
| Wide — 30mm | 32–40 cm | Border Collie, Australian Shepherd, English Springer Spaniel |
| Wide — 30mm | 38–48 cm | Labrador Retriever, Golden Retriever, German Shorthaired Pointer |
| Wide — 30mm | 46–56 cm | German Shepherd, Rottweiler, Doberman |
| Wide — 30mm | 57–65 cm | Great Dane, Saint Bernard, Mastiff, Newfoundland |