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Dog Health & Care

How Should a Dog Harness Fit? Types, Ideal Size & Measuring Tips

Nicole Cosgrove
By Nicole Cosgrove · Reviewed & fact-checked by Dr. Paola CuevasVet Approved
Dr. Paola Cuevas
Reviewed & Fact-Checked byDr. Paola CuevasVeterinarian
Dr. Paola Cuevas is our Senior In-House Veterinarian at Dogster and Pangolia. She has over 19 years of experience working with an array of species and loves sharing her knowledge and experience with our readers and aims to provide assistance with any issue presented by your non-human family members. She received her degree from the University of Guadalajara, Mexico.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on July 30, 2026
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Young Border collie dog in dog harness playing

If you haven’t ditched the dog collar yet, you should. Harnesses are far more comfortable for your pup, and they offer the handler advantages you can’t get with a collar. But when you’re switching to a harness, you need to ensure it fits properly. The simple rule says that you need to fit one or two fingers under the harness, but there are more things to consider!

How should a dog harness fit, what size do you need to get, and what are the different types of dog harnesses out there? It’s a lot to sift through, which is why we highlighted everything you need to know here.

divider dog paws 2 oct 2024

Measuring Your Dog for a Harness

Most dog harnesses will use three different measurements to help you get the right harness for your pup. So, to get the right size harness for your dog, you need to know what the three measurements are needed and how to get them.

The first measurement is the easiest to get: their weight. This is a measurement that many companies use as their sizing chart, but it’s not perfect. The problem is that your dog can carry their weight in a lot of different areas. Still, if the company uses weight as a guide, you need to know how much your pup weighs.

Next, you need to get a chest measurement for your dog. Measure around the widest part of their torso, typically just behind the front legs.

Finally, many harness companies use neck measurements in their sizing guide. When measuring your dog’s neck, always measure around the base of the neck (where it meets the shoulders), which is typically the widest part.

Image By: Justin Veenema, Unsplash

How Tight Should a Dog Harness Be?

It’s easy to put on a dog harness and have it either too tight or too loose. When putting on a dog harness, you should aim for snug but not too tight. It’s a fine line, but a finger test should help you get it right the first time.

Ideally, you should be able to slide one or two fingers under the harness, but not more. This will ensure the harness isn’t too tight on your dog, but it won’t be so loose that it can snag on objects as they walk by or allow them to slip out of the neck part.

Signs the Harness Isn’t on Correctly

You’re aiming for a snug, but not too tight fit, and it’s an easy mark to miss. It’s perfectly normal to make mistakes, but you need to be able to recognize when something’s wrong.

The first sign is if your dog can wiggle out of any part of the harness. If they can, it’s simply too loose. On the other hand, if they’re showing signs of chafing, it's too tight. Chafing can show itself in red marks or irritation, but it can also show up as a loss of fur where the harness sits.

Two additional signs of a harness that isn’t tight enough are a chest strap that loosens as you’re walking or the back piece of the harness rotating out of place. If either of these things is happening, the harness isn’t fitting correctly.

Image By: marekuliasz, Shutterstock
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The 3 Different Types of Dog Harnesses

When looking at dog harnesses, there are three main types. There’s no right or wrong choice here, but it will drastically affect how you put the harness on them.

1. Front Clip

Image Credit: Lee Hardy, Unsplash

If your dog pulls a ton, then you should consider getting a front-clip harness. This harness has a clip for the leash on the front. These types of harnesses can help reduce pulling by redirecting the dog’s body to the side when they pull, which may make forward pulling less effective.


2. Top Clip

Image By: Pixabay

The top-clip dog harness is probably the most common type of dog harness out there. You connect the leash to the back of the harness, and often, there are two separate clips you need to connect.

This type of harness doesn’t discourage pulling, but it does help reduce the risk that you end up tangled with the leash.


3. Dual Clip

Image Credit: MathieuLphoto, Shutterstock

Dual-clip harnesses have both a front and a top clip you can pick from for different situations. These harnesses may cost a bit more, but they give you more versatility than front and top-clip harnesses.

divider dog paws 2 oct 2024

Final Thoughts:

When you’re putting a harness on your dog, take your time. Getting a proper fit will ensure they’re happy on their next walk and that they are less likely to slip out of it if something excites them. Harnesses are an excellent choice for your dog, but only if you take the time to put them on correctly!

Even after initial adjustment, harnesses should be checked regularly and may need readjustment over time due to changes in body condition, coat, or wear of the equipment. So we recommend getting into the habit of reviewing the fit regularly. 


Featured Image Credit: Julia Malsagova, Shutterstock

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