Small Dog Harness Guide: How to Choose the Right Size and Type

Small dogs have delicate necks and sensitive windpipes, which is why many vets and trainers recommend walking them on a harness rather than just a collar. A harness spreads pressure across the chest and shoulders and gives you better control without pulling on the neck. But a badly sized harness can rub, slip or let your dog wriggle free in the middle of the street. Here's everything you need to know.

Step 1: Measure your dog (don't guess by weight)

Weight is only a rough guide. What matters is chest girth:

• Chest girth – measure with a soft tape around the widest part of the ribcage, just behind the front legs.
• Neck girth – where the collar usually sits.
• Compare with the size chart on the product page. If your dog is between sizes, choose the larger one and tighten the adjustable straps.

The two-finger test: with the harness closed, two fingers should fit between the harness and the body. Less is too tight; more and your dog may slip out.

Step 2: Choose the type

• Breathable mesh vest harness – soft, light and especially comfortable for small dogs and puppies, and great in hot weather. For example the breathable mesh harness & leash set or the reflective vest harness for small dogs.
• No-pull harness – with a chest attachment ring. When your dog pulls, it gently turns them back towards you. Ideal for eager walkers, like the saddle-style no-pull harness.
• Padded harness with a handle – gives you a quick grip when you need to lift or stop your dog, like the padded no-pull chest harness.

Step 3: How to put a harness on a small dog

1. Open all the buckles and lay the harness on the floor.
2. Let your dog sniff it and reward with a treat, so the harness becomes something positive.
3. Slip the head through (or the legs, for a step-in vest), close the buckle and check the two-finger test again.
4. For the first few days, leave the harness on for a few minutes at home before going out so your dog gets used to it.

Safety tips

• Re-check the fit every few weeks, especially with fast-growing puppies.
• For evening walks, choose a harness with reflective strips.
• In the car, clip the harness to a dog car seat belt – never the collar.

FAQ

Harness or collar for a small dog?

For walks, a harness. A collar can stay on with a name tag, but don't attach the leash to it if your dog pulls.

Can the harness stay on all day?

Better to take it off at home to prevent rubbing and let the coat breathe.

All harnesses, collars and leashes: harnesses & leashes.