Small Dog Collars: How to Choose and Fit a Collar for a Small Breed

I get a lot of small dog enquiries through the workshop. Chihuahuas, miniature poodles, papillons, Yorkies, and the occasional Italian greyhound that sits at the edge of the small breed and sighthound categories. The thing they have in common is that the standard 25mm dog collar overwhelms them, both visually and physically. The industry tends to scale down a standard collar rather than design for a small dog from scratch. The result is a collar that fits but does not feel right.

What follows is what I have worked out about small dog collars from making them, fitting them, and from the feedback owners give me when a collar lands well or does not.

What Counts as a Small Breed for Collar Fitting

The clearest rule is neck circumference rather than overall body size. If your dog's neck measures under 30cm, you are in small breed territory for collar fitting. That includes most chihuahuas, mini poodles, papillons, Yorkshire terriers, Maltese, bichons, and small mixed breeds. Italian greyhounds and other small sighthounds technically fall in the same circumference range but have specific requirements that I cover separately. Dachshunds sit in the same range, but their long backs change the advice enough that I have written it up on its own in the guide to dachshund collars.

The fitting issue is not just length. A standard collar adjustable down to a 30cm neck still has a strap width of 25mm and standard hardware. On a 28cm neck, that 25mm strap takes up a disproportionate amount of the dog's neck profile, and the hardware weight pulls the collar down at the buckle.

Why Strap Width Matters for Small Dogs

A 25mm strap on a small neck does two things. Visually it looks heavy, dominating the dog's profile in a way that suggests a collar designed for a larger dog. Physically, the same strap width transfers tension over a narrower section of neck, which can cause discomfort during pulling or with smaller, more sensitive dogs.

Drop to a 16mm leather or 16mm BioThane strap and the load spreads over the neck more sensibly. The collar carries lighter, the proportions come right, and I can take the hardware down a size to suit it. The Sheep Shed Mini was developed specifically because I kept seeing standard wool collars look wrong on small terriers and toy breeds, and a smaller version was clearly needed.

Fit and the Two-Finger Rule

The standard fitting rule for any dog collar applies to small dogs as well: you should be able to slide two fingers comfortably between the collar and the neck. Tighter than that and the collar will rub or restrict. Looser than that and the dog can slip out, especially in a panic.

For small dogs, where to measure matters. The neck is narrowest just behind the ears and widens as it joins the shoulders. Measure at the point where the collar will actually sit, which is usually at or just below the base of the throat. Add 2cm.

If your dog is between sizes, size up rather than down. A collar that is slightly long on the smaller end of its adjustment range fits better than a collar maxed out at its longest setting. The measuring guide covers how to take the measurement properly.

The Sheep Shed Mini for Small Breeds

The Sheep Shed Mini is the small breed collar in the Sheep Shed range. It uses a two-row fishtail weave, 20mm of wool over a 16mm leather or 16mm BioThane strap, in either Brampton wool (charcoal grey) or Dingley wool (ecru white). The hardware is solid brass, sized down to suit the smaller strap. It was developed when I kept seeing the Sheep Shed Classic, a 34mm wool weave over a 19mm strap, look out of proportion on dogs this size.

The Mini is part of the broader Sheep Shed range, which uses named British wool throughout. For small dogs that wear their collar most of the day, the wool's breathability matters as much as the fit.

Other Small Breed Collar Options at Green Dog

The Sheep Shed Mini is the wool option for small dogs. There are a few others in the workshop range worth knowing about.

The personalised paracord collar in its smallest sizes, 9 to 12 inches and 11 to 14 inches, is the entry point most small dog owners start with. It is fully customisable on cord colours, BioThane strap colour and hardware finish. The fit is good for a wide range of small breeds, and the personalisation lets you match the collar to the dog rather than the other way around.

The customisable BioThane collar in its smallest size, 9 to 12 inches, is the right call for small dogs that swim or live in wet conditions. The waterproof, wipe-clean BioThane works the same way it does on a larger dog.

For small sighthounds (Italian greyhounds in particular), the Sheep Shed Sighthound in the smallest size, or the Cotswold Rambler BioThane sighthound collar, are the better fit because they account for the specific shape of a sighthound neck. Standard small collars do not.

Frequently asked questions