Harnesses

Small dogs don't carry pressure the same way. On breeds like Chihuahuas, Pomeranians, and Yorkies, a collar puts all tension on the neck — exactly where it shouldn't sit. A harness shifts that to the chest, where it belongs. For most dogs under 12kg, that makes it the better everyday choice. Collars still have their place — mostly for ID, not for pulling.

→ Collar vs. Harness for Small Dogs

It depends on how your dog moves.

Step-in harnesses are the easiest to put on—your dog steps into the two loops, and you clip at the back. Ideal for dogs who don't like things going over their head.

H-harnesses are adjustable and easy—a solid default. The H-shape connects straps around the neck and chest, offering a secure, customisable fit.

Y-harnesses have a Y-shaped front that sits higher on the chest, allowing more freedom through the shoulders. Great for active dogs who need full range of movement.

For small dogs, comfort and weight matter most. Look for lightweight hardware, padded straps, and adjustable sizing to get a snug fit without bulk.

→ Compare harness types in our guide

A harness should be snug but not tight. You should be able to slip two fingers underneath any strap. Check that:

• The chest strap sits on the breastbone, not pressing on the throat
• The back clip sits between the shoulder blades, not sliding to one side
• There's no rubbing under the front legs
• Your dog can move freely without the harness shifting or rotating

If between sizes, size down and adjust the straps for a custom fit.

→ Size & Fit Guide

Chest first. Measure around the widest part of the ribcage, just behind the front legs — that's the number that matters. Some brands also use neck measurements, but chest fit comes first. Sizing varies more than people expect between brands, so always check the chart.

→ Size & Fit Guide

Weight gives an idea. Shape decides the size. A Chihuahua or Yorkie will usually sit in XS or S. A French Bulldog often sizes up because of the chest — even at the same weight. If you're between sizes, the Bisou Snug Rule applies: go with the closer fit, not the looser one. That's what keeps everything in place.

→ Size & Fit Guide

Yes — and it's the better way to do it. Harness first, then layer on top. That keeps the fit stable and avoids pressure shifting. Most coats have leash access built in. Some pieces combine both — no layering needed.