Size Guide
Measure the chest, not the breed
Two dogs of the same breed can be two sizes apart. Run a tape around the widest part of the ribcage, just behind the front legs, and pull it snug without compressing the fur. That number picks the size.
| Size | Chest | Weight | Tested lift | Fits like |
|---|---|---|---|---|
| XS | 12–15 in | up to 10 lb | 4 lb | Chihuahua, mini dachshund |
| S | 15–20 in | 10–20 lb | 7 lb | Dachshund, Jack Russell |
| M | 20–26 in | 20–40 lb | 12 lb | French bulldog, corgi, spaniel |
| L | 26–33 in | 40–70 lb | 18 lb | Labrador, golden retriever |
| XL | 33–42 in | 70 lb + | 26 lb | Ridgeback, shepherd, mastiff |
If he is between sizes
Go up. A vest slightly too big can be strapped down. One slightly too small restricts the shoulders and he will fight it.
Checking the fit
- Two fingers. You should slide two fingers under any strap, no more.
- The handle sits over the shoulders, not the lower back. If it has slid backwards the vest is too loose.
- Full shoulder movement. Walk him in it before he swims in it.
- Chin pad under the jaw, not against the throat.
Why too big is worse than none
A loose vest rides up over the shoulders when he swims and pushes into the throat. That is more dangerous than no vest, because it restricts him exactly when he needs to breathe hardest.
Got it wrong?
Free size swap for 90 days. One per order. Sizing a dog you cannot put on a scale is genuinely hard, so we do not make you pay for guessing.
Breed-by-breed guides · Shop the vest
A buoyancy aid, not a substitute for you. Always supervise your dog in and around water.