Harness Size & Fit Guide
Measure, choose your size and learn how your harness should fit - all in one place.
How to Measure
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Neck:
Measure around the base of your dog's neck where the harness naturally sits.
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Chest:
Measure around the widest part of the chest, just behind the front legs.
Find Their Size
Compare your dog's neck and chest measurements against the chart below. If you're between sizes, see our fitting advice further down the page.
Fitting Tip
One of the most common fitting mistakes is tightening the neck straps too much.
Although it feels like tightening the neck will make the harness more secure, it often does the opposite. An over-tightened neck pulls the entire harness forwards, reducing the space behind your dog's front legs and increasing the chance of rubbing.
Instead, loosen the neck slightly, slide the harness back so it sits comfortably behind the front legs, then tighten the body straps until the harness feels secure.
If you've adjusted all four straps and the harness still doesn't sit comfortably, the shape of the harness may not be the best match for your dog's build.
Fitting Advice & FAQs
My harness sits too close to my dog's front legs
A common mistake when adjusting a 4p point adjustable harness is tightening the neck straps too much. When the neck is over-tightened, it pulls the entire harness forward, leaving less space behind the front legs and increasing the chance of rubbing.
Instead, try loosening the neck straps slightly, slide the harness back into the correct position, then tighten the body straps until the harness feels secure. In many cases, this simple adjustment is all that's needed for a much better fit.
If the harness still sits too close to the front legs after adjusting all four straps, it may be that the shape of the harness isn't the best match for your dog's build.
My dog is between sizes
If they're close to the maximum measurement or still growing, we'd generally recommend sizing up.
There's a gap between the harness and my dog's back. Is that normal?
Yes - in most cases, this is completely normal.
Our harness has a structured design, meaning it holds its shape rather than sitting tightly against your dog's body like soft fabric. This helps distribute pressure evenly while allowing your dog to move naturally.
As your dog lowers their head to sniff, climbs over obstacles or stretches forwards, you may notice a small gap appear across the top of the harness. This extra room allows the shoulders and spine to move freely and helps reduce rubbing during movement.
A harness isn't designed to mould to every movement. As your dog bends, stretches and sniffs, the harness will naturally move with them. A small amount of movement is normal and allows your dog to move comfortably.
How do I know if I've adjusted it correctly?
Once fitted correctly:
• You should be able to fit two fingers beneath each strap.
• The harness should sit just behind the front legs.
• The front chest panel should sit comfortably without riding into the throat.
• The harness shouldn't twist or slide while walking.
How should the harness sit?
The front chest panel should sit comfortably on your dog's chest without riding up into the throat. Around the body, the harness should sit just behind the front legs while leaving enough room to avoid rubbing.
Can I choose a size based on breed?
Breeds can vary significantly in shape and size. We always recommend measuring your dog rather than choosing a size based on breed alone.
My harness keeps moving while walking
A correctly adjusted harness should stay in place without twisting or shifting excessively.
Check that the body straps are snug, and make sure the neck isn't over-tightened. Small adjustments to each of the four straps usually make a big difference to how the harness sits.
My dog is a certain size in other brands, why aren't they the same here?
Sizing isn't standardised across the dog gear industry. Every harness brand is designed differently.
Different brands use different shapes, proportions and adjustment ranges, meaning your dog may wear a Medium in one harness and a Large in another.
We always recommend choosing a size using your dog's neck and chest measurements, rather than the size label from a previous harness.
Still Need Help?
Not sure which size to choose?
Send us: Breed, Age (if still growing), Neck measurement and chest measurement and we'll do our best to help choose the right size.