Dog Ball Size Guide
This is the most important page on this site and it takes two minutes to read. Ball size is the only ball-related decision with a genuine fatality risk attached, and it is the one most commonly got wrong.
The rule: a ball must be too big to fit entirely behind your dog's canine teeth, and small enough for your dog to pick up comfortably. If it fits fully inside the mouth with room to spare, it is too small - it can travel to the back of the throat and seal the airway. When in doubt, size up.
The two-minute test
- Find your dog's canine teeth. The four long pointed teeth near the front of the mouth.
- Hold the ball at the front of the open mouth. Gently, and not with a dog that resents mouth handling - use the weight chart below instead if so.
- Ask: could this ball sit fully behind those canines? If yes, it is too small. The ball needs to be wide enough that the canines still contact it when the mouth closes.
- Now check the other direction. Can your dog pick it up off the ground and carry it without struggling? If it needs to work at it, size down one step.
If both conditions cannot be met at once - too small to be safe, too large to carry - your dog needs a different shape of toy rather than a different size of ball. A rugby-shaped or bone-shaped fetch toy solves this for some dogs.
Size chart by weight
| Dog weight | Ball diameter | Chuckit sizing | Typical breeds |
|---|---|---|---|
| Under 9kg | 2 inches (5cm) | Small | Chihuahua, Yorkshire Terrier, Pug, Dachshund |
| 9-27kg | 2.5 inches (6.5cm) | Medium | Cocker Spaniel, Border Collie, Beagle, Staffie |
| 27-45kg | 3 inches (7.5cm) | Large | Labrador, German Shepherd, Golden Retriever, Boxer |
| 45kg+ | 3.5-4 inches (9-10cm) | XL / XXL | Great Dane, Mastiff, Newfoundland, St Bernard |
Weight is a proxy for mouth size, not the thing itself. A greyhound and a bulldog at the same weight need different balls. Always confirm with the physical test above.
Four exceptions to the chart
Flat-faced breeds: size down, and choose open construction
A pug's jaw is short, so it needs a smaller ball than its weight suggests - and more importantly it needs a ball it can breathe through. Full detail in our flat-faced breeds guide.
Long-muzzled breeds: size up
Greyhounds, whippets, collies and other long-jawed dogs can get more ball into the mouth than their weight implies. Go one size above the chart.
Puppies: recheck every six to eight weeks
This is where most accidents happen. A ball that was correctly sized for a four-month-old Labrador is a choking hazard for the same dog at nine months. Diarise a check.
Multi-dog households: size for the largest mouth
If a Jack Russell and a German Shepherd share a toy basket, every ball in it must be safe for the German Shepherd. The small dog can manage a large ball far more safely than the large dog can manage a small one.
Why a small ball is so dangerous
The failure mode is not the dog swallowing the ball. It is a vacuum seal. A smooth solid ball that reaches the back of the throat can seat against the soft tissue and create negative pressure behind it, which holds it in place with real force. Owners who have been through it describe being unable to hook the ball out even with fingers on it, and the dog has only a couple of minutes.
Two things eliminate most of the risk: a ball too wide to travel back that far, and a ball with a hole bored through it so pressure equalises and no seal can form. The KONG Extreme Ball is on our top five list largely for that second reason.
If you want the emergency procedure - and you should read it before you need it - it is on our ball safety page.
Size is not the only fit question
- Weight. A dense ball is tiring for a small dog to carry and can bruise a soft mouth. Lighter is better for small and elderly dogs.
- Surface texture. A slightly tacky rubber surface is easier for a dog to pick up than a smooth glossy one, which matters for dogs with dental problems or a poor grip.
- Hardness. Puppies with milk teeth and seniors with worn or missing teeth need a softer ball. Hard nylon and hard plastic fracture teeth at any age.
Frequently asked questions
What size ball should I get for my dog?
Can a ball be too big for a dog?
Is a tennis ball the right size for a Labrador?
How often should I check my puppy's ball size?
Why do some dog balls have a hole through the middle?
How we test
Every ball on this site is bought at full retail price with our own money. Nothing here is a sample sent by a brand, and no manufacturer sees a review before it is published.
Testing runs over a minimum of six weeks with four dogs chosen for genuinely different jobs:
- A Labrador who fetches hard but chews gently - the volume tester. If a ball survives him it has survived a lot of repetitions.
- A Staffordshire Bull Terrier who destroys most things within a fortnight. He decides every durability verdict on this site; the other three rarely mark a ball at all.
- A whippet who runs flat out and catches in the air. She is the reason we care about how a ball behaves in flight rather than just on the ground - whether it tumbles or flies true, whether it is light enough to catch cleanly at speed without jarring, and whether the surface gives enough grip for a dog to take it out of the air rather than bat it away. A ball that is fine to pick up off the grass can be genuinely unpleasant to catch, and nothing else in the group would have shown us that.
- A twelve-kilo terrier cross used to check whether smaller mouths can carry a ball comfortably, and whether the weight is manageable over a full walk.
We record bounce height from a two-metre drop onto paving, whether the ball floats in still water and how much of it sits above the waterline, throwing distance with a standard launcher, catchability in flight, and the physical state of the ball at two, four and six weeks. Balls that split, delaminate or lose their shape inside six weeks do not make the recommendations regardless of brand.
Where we have not tested something, we say so on the page rather than inventing a verdict. That currently applies to the automatic ball launchers, the light-up ball category, and some of the squeaky and treat-dispensing products - each carries a visible notice.