British vest
| Size | Back Length (max) | Neck Girth (max) | Chest Girth (max) | Refer to Pet’s breed | Refer to Pet’s weight |
| S | 30cm | 30cm | 40cm | Pomeranian, Yorkshire | 3.0-4.5kgs |
| M | 35cm | 32cm | 45cm | Teddy, Cats | 4.5-7.5kgs |
| L | 38cm | 36cm | 52cm | Bichon Frise, Bulldogs, Dachshund | 7.5-10.0kgs |
| XL | 45cm | 45cm | 60cm | Corgi, Shiba inu | 10.0-14.0kgs |
| 2XL | 50cm | 48cm | 70cm | Corgi, Pitbull | 14.0-17.5kgs |
| 3XL | 55cm | 52cm | 75cm | Corgi, Pitbull, Border Collie | 17.5-22.5kgs |
| 4XL | 60cm | 54cm | 82cm | Border Collie, Boxer | 22.5-27.5kgs |
| 5XL | 65cm | 56cm | 90cm | Golden Retriever, Doberman, Labrador | 27.5-32.5kgs |
| 6XL | 70cm | 60cm | 100cm | Rottweiler, German Shepherd | 32.5-40.0kgs |