45cm across once inflated — about 17.7 inches — and roughly 790g.

Medium and large dogs from about 10kg up: big enough that a collie or labrador cannot get their jaws round it. For a small dog under about 10kg, choose a 25cm herding ball instead.

The shell is built to deflate slowly rather than burst, so the session does not end on the spot. Take it away once it is losing air and keep play supervised.

45cm across (about 17.7 inches), inflated. Every measurement we hold for this product is in the specifications above.

About 790g, according to the manufacturer’s specification.

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Reinforced PVC. Full specifications are listed above.

You have 30 days from delivery to change your mind. Just email us with your order number and we’ll send the return steps the same working day — see our delivery & returns page for details.

The 45cm for most. A typical Border Collie is 14–20kg, so 45cm is the right ball: too big to get their jaws round, and light enough to push. One size covers the whole breed. Bred to move stock, so most take to a herding ball in the first session.

The 45cm for most. A typical Cocker Spaniel is 13–14.5kg, so 45cm is the right ball: too big to get their jaws round, and light enough to push. One size covers the whole breed. Chasers rather than shovers; keep the first sessions short and it holds their interest.

The 45cm for most. A typical Staffordshire Bull Terrier is 11–17kg, so 45cm is the right ball: too big to get their jaws round, and light enough to push. One size covers the whole breed. Terriers bite before they push — if they get any grip on it at all, go up a size.

The 45cm for most. A typical Jack Russell Terrier is 5–6kg, which puts them on a 25cm ball. 45cm is the closest this one comes in — a size up, which still works, it is just more to push. One size covers the whole breed. Terriers bite before they push — if they get any grip on it at all, go up a size.

The 45cm for most. A typical Miniature Dachshund is 4–5.5kg, which puts them on a 25cm ball. 45cm is the closest this one comes in — a size up, which still works, it is just more to push. One size covers the whole breed. Hounds are chasers, and a ball they can never catch keeps them going.

The 45cm for most. A typical Cockapoo is 5–11kg, which puts them on a 25cm ball. 45cm is the closest this one comes in — a size up, which still works, it is just more to push. The breed runs 5–11kg and crosses a size step, so go by your own dog — smaller, up to 9kg: the 45cm; larger, over 9kg: the 45cm.