A collar that fits well should be snug enough that it cannot slip over the ears, and loose enough that it never presses on the throat. The whole science fits in one hand gesture: the two-finger rule.

How to measure the neck

Use a soft tape and measure around the lower neck, where the collar naturally rests - a little above the shoulders. Add roughly 2-3 cm for small dogs and 4-5 cm for large dogs, or simply follow the size range printed on each product page.

The two-finger rule

With the collar buckled, slide two flat fingers between the collar and the neck. If they fit with light contact, the fit is right. If you need to force them, it is too tight; if there is space left over, it is too loose and your dog can back out of it during a walk.

Puppies outgrow collars fast

Check the fit every couple of weeks during the first year. Growing dogs can go up a size in a month, and a forgotten tight collar can rub the coat and skin. An adjustable collar buys you time between sizes.

Width matters too

Thin collars concentrate pressure and suit small, calm dogs. Wider collars spread the load and suit strong necks - but on a tiny breed a wide collar can restrict head movement. Match the width to the dog, not to the look.

When you know the neck size, explore our collar collection or go straight to adjustable collars if your dog is still growing.