Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How to Measure for a Cat Harness: 3 Vet-Approved Tips

Share

cat in harness with leash lying on the beach next to a pet carrier

Before buying or ordering online, you should measure your cat for a harness very carefully to ensure a proper fit. If the harness is too big, your cat might escape, and the harness can rub and irritate your cat’s skin. Sometimes, bald spots, injuries, or sores may even pop up. If the harness is too small, it can change your cat’s stride and lead to soreness or even difficulty breathing. Either way, your cat isn’t going to have a good time.

Sadly, measuring a finicky cat isn’t always the easiest. You need rather accurate measurements for this, though many harnesses are adjustable to some extent. Measuring your feline is often more challenging than it may seem.

It helps to have two sets of hands when measuring your cat for a harness. Once you have a friend to help you, you can try out the steps below for an accurate measurement.

divider 2 cats

 

Finding the Right Harness

With so many different variations and styles on the market, finding one right for your cat can be tough. The first thing you’ll want to confirm is if it is, in fact, a cat harness. Although dog harnesses are often marketed towards cats, there are simply different needs between the two species. Other factors might include materials, durability, reflectivity, and more. Learn about the top cat harnesses here.

Are you looking for the perfect cat harness? We suggest Hepper's Cat Harness & Leash Set, which includes a nicely designed, machine-washable harness made from soft, sturdy velvet and mesh.

Hepper Cat Harness and Leash Escape Proof Set
  • Escape Proof - Cat leashes and harnesses for walking aren't all equally secure. Our double aluminium...
  • Superior Comfort - Our cat harnesses are lightweight, made with premium velvet fabric, breathable...
  • Free Extra Strength Leash - You don't need to worry about your cat escaping this harness. This cat...

This harness is easy to put on and take off and features reinforced stitching, reflective stripes, and quick-release buckles. This set also includes a great leash made from durable nylon climbing rope.

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

divider 1 paws

The 3 Tips for the Purrfect Fit

How-to-measure-your-cat-for-a-harness
You are free to use this image but we do require you to link back to Catster.com for credit

1. Measure the Chest

First, measure around your cat’s chest. Most companies use this measurement. Aim for the area right behind your cat’s shoulder blades, but not on their shoulder blades. Sometimes, you may need to measure around their neck and/or their chest. In this case, you don’t want to measure where the collar goes. Instead, you want to measure their breastbone and up to their shoulder blades.

Be sure the measuring tape is tight, especially if your cat is on the fluffy side. You want the measuring tape to be snug—though don’t squeeze your cat too much. If your cat isn’t taking to the measuring tape, try distracting them with a high-quality treat. Give your feline something they don’t normally get to distract them.


2. Compare to the Manufacturer’s Chart

Once you’ve measured around your cat’s chest, it’s time to compare those measurements against the harness company’s guidelines. Each company is different, so don’t assume that your feline will always be one size. You should check each harness before you order to ensure that you’re purchasing the correct option.

Many harnesses are adjustable. Therefore, sizing is often a range. You don’t have to get the exact number, because you’ll be able to adjust it to fit as needed.

Before ordering, we do recommend reading reviews for the harness. Sometimes, harnesses run large or small. The reviews should let you know about this discrepancy, allowing you to choose a size bigger or smaller if you need to. Of course, if companies seem to be all over the place with their sizing, you may decide not to purchase their harness after all.

If you took both measurements, you might see both listed in certain sizes. If the ranges don’t match up, then you’ll have a hard decision to make. Sometimes, the reviews will give you the clues you need to choose a size. Other times, you may want to order two sizes to see which one fits best. Just make sure you can return the one that doesn’t fit.


3. Potential Complications

There are many times when measuring is less than straightforward. Very fluffy cats are harder to measure, as you have to compress their fur with the measuring tape. Otherwise, the cat’s harness will be far too large. Still, because of all that fur mass, these cats often need a larger size than shorthaired cats. Always measure to be sure, though.

Obese cats are also complicated to measure. Sometimes, the cat’s neck area doesn’t hold a lot of fat, while their chest does. Therefore, it can be challenging to determine which size to get.

Cats can also vary in size at different parts of their life. If your cat is overweight, you may be interested in a harness to help increase their daily activity and exercise. Of course, you’ll need a harness that can fit your cat now, but they may quickly become too small for that harness if they lose a bunch of weight. Sadly, there isn’t an easy way to counteract this. Sometimes, you just have to purchase multiple sizes.

Younger cats often gain weight as they age. Sometimes, you get lucky and have a cat that’s at the low end of a harness’s size range, allowing you to just adjust it larger as they grow. Sadly, this isn’t always possible. Sometimes, you end up needing to purchase two different sizes.

the owner puts on a leash with a harness on a kitten
Image Credit by: Katerina Dalemans, Shutterstock

divider 2 cats

Important Considerations

You will need to carefully measure your cat to figure out the right harness size. When you purchase a harness for your cat, it is very important to make sure it is not too tight. The ideal fit is secure but has enough space for you to put two fingers underneath. This helps to ensure that the harness is not so tight that it would hurt your cat but also not so loose that your cat can slip out.

Taking Measurements on a Fearful Cat

Some cats also hate being measured. Some may be fearful of the measuring tape and turn into a ball of fury whenever you try to wrap it around them. We recommend first attempting to introduce the cat to the measuring tape in a positive way using treats. However, completely familiarizing a scared cat with a measuring tape can take months, and you probably want to order the harness right away.

In this case, we recommend taking something your cat is already familiar with, like the string on a cat wand or a piece of ribbon, and using that as a measuring tool. Simply wrap the string around your cat’s body like you normally would, marking where the ends meet. Then, measure the string to that point to get an estimate of your cat’s size.

Luckily, sizing doesn’t have to be precise. Therefore, if your cat rolls around and makes it hard to measure them, just get as close as you can. If you have a hard time, be sure to purchase a harness that has some adjustability.

scared British blue-point cat hiding under the bed
Image Credit by: Zossia, Shutterstock

divider 3 paws

Conclusion

Measuring a cat is often easier said than done. The process is pretty simple—you need your cat’s chest measurement from right behind their armpits, as well as their lower neck measurement. Simply wrapping a tape measure around your cat will provide you with these measurements, allowing you to pick a perfectly sized harness.

However, many cats won’t just lay there while you measure them. Instead, you’ll need to wrestle and potentially distract your cat with treats. Luckily, most cats aren’t scared of tape measures, as they just look like ribbons. Fearful cats will be much harder to measure, though. Often, you’ll have to use a different material to wrap around your cat and then measure that material with a tape measure.

Having two pairs of hands is helpful in any case. You may need one person to distract your cat while the other does the measuring. Don’t attempt to hold the cat while measuring, though, as this can lead to your cat becoming scared.


Featured Image Credit: sofirinaja, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

What Feral Cats Actually Need From the People Who Feed Them

Feral cats are everywhere. Slipping between parked cars, darting under porches, appearing briefly at dusk before vanishing again. Most people see them, feel...

Capturing Catstanbul

Istanbul – famous for its bustling markets, unique architecture, and vibrant culture, there is one more feature of this Mediterranean capital that deserves...

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

More related

An Owner’s Manual on Spaying or Neutering Your Cat: Why Not to Feel Guilt

Hi, I’m Dr. Lauren! Read my introduction to learn more about me and my two adventurous cats, Pancake and Tiller. Having your cat...

Can Cats Eat Toothpaste? Vet-Verified Risks & Precautions

Toothpaste is a standard personal care item found in most homes and some handbags and briefcases. If your beloved feline has found their...

Can Cats Eat Cream? Vet-Reviewed Feeding Facts

Everyone knows the one about the cat that got the cream, but have you ever wondered if cats actually can, or should, eat...

How to Give Subcutaneous Fluids to a Cat? 9 Vet-Approved Steps to Follow

Keeping our pets healthy is of vital importance, and sometimes, we need to step outside our comfort zones to provide our pets with...

Keep reading

Is Baby Food the Secret to Homemade Cat Food? Read This First

You love your cat like they’re family (because they are). But there might be times when you’ve run out of your cat’s kibble and only have some (human) baby food in the cupboard. Or maybe you want to make homemade...

jars of baby food

Are Polka Dot Plants Toxic to Cats? Vet-Reviewed Houseplants Examined

The polka dot plant (Hypoestes phyllostachya) is also known as the pink polka dot plant, the measles plant, baby’s tears, or freckle face. The green leaves have freckled markings of pink that look like polka dots. The more sunlight the...

Catster_Are Polka Dot Plants Toxic to Cats

Why Does My Cat Hunt? Vet-Approved Behavior Science & Information

If you make sure your cat is always well-fed and has plenty of toys, it can be frustrating to find that they still want to hunt. Whether that’s catching something in your backyard or stalking the dog, most cats can’t...

Black Oriental Shorthair in the grass

What Do Cats Need in Their Diet? 6 Vet Verified Essential Nutrients

Cat owners want their beloved felines to live a long, happy life, and that long and happy life starts with nutrition. Cats are obligate carnivores, meaning they require nutrients found in animal meat to thrive. A critical aspect of being...

black and white old cat eats from a plate

Is Prescription Cat Food Necessary? Vet-Verified Health & Nutrition Facts

There are so many types of cat food on the market, and a glance at the cat food section in a pet store proves this. With so many options, you might be confused as to which foods are truly good...

close up doctor filling up a prescription form

Low Blood Pressure in Cats: Our Vet Explains the Signs, Causes, Treatments & FAQ

Low blood pressure occurs less commonly in cats than high blood pressure does. Causes may include blood loss, severe infection, heart disease, or even side effects from medications. Cats with low blood pressure may have pale gums, weakness, behavioral changes,...

domestic striped kitten with a sad face feels sick

Polypropylene Glycol and Cats: Vet-Reviewed Facts & Safety Advice

Their independent nature and selective food preferences limit the number of poisoning cases involving cats. Dogs are four times more likely1 to experience this health issue. Glycols are some of the most common toxic agents affecting pets. One of the...

a cat that feels sick and seems to vomit

How Long Will My Cat Have Diarrhea Once They’ve Been Dewormed? Vet Reviewed Facts

Deworming is a necessary treatment for cats infested with parasites. Parasites are common in cats as they can be spread in various ways, depending on the type. Thankfully, the treatment is safe and effective and only sometimes causes a day...

cat litter box

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.