Getting the right harness fit is one of the most important steps in keeping your dog safe, comfortable and happy on walks. A harness that is too loose can allow your dog to slip out, while one that is too tight can restrict movement and cause rubbing or discomfort - and these are the two most common complaints we see at events.
Taking a few simple measurements before ordering can help you choose the perfect size first time.
In this guide, we’ll show you exactly how to measure your dog for a harness and how to check that the fit is correct once it arrives.
Why Harness Fit Matters
- A properly fitted, good quality harness will:
- Allow your dog to move naturally
- Prevent escape during walks
- Prevent rubbing under the legs or chest
- Distribute pressure more evenly than a collar alone
- Keep your dog comfortable during longer walks and adventures
At Bew Dogs, our collection of harnesses are designed to be secure, comfortable and adjustable, making them suitable for a wide range of breeds and body shapes.
What You’ll Need
Before measuring your dog, grab:
- A soft tape measure
- A pen and paper (or your phone)
- A few treats to keep your dog still
If you don’t have a tape measure, you can use a piece of string and measure it against a ruler afterwards.
Step 1: Measure Your Dog’s Chest
The chest measurement is the most important measurement when choosing a harness. Place the tape measure around the widest part of your dog’s chest, usually just behind the front legs. The tape should be snug but not tight. Record the measurement in centimetres.
Example
A Labrador may measure around 70cm.
A Cockapoo may measure around 55cm.
A French Bulldog may measure around 60cm.
Always measure your own dog rather than relying solely on breed guides, as dogs can vary significantly in size.
Step 2: Measure Your Dog’s Neck
Take the measurement around the neck using your tape in the same way. This should be the widest part of the neck and should include roughly 2 fingers gap for comfort. The neck circumference should be snug but not tight.
Bew Dogs Harness Size Guide
| Neck length: | Chest length: | |
| XXS: | 22-31cm | 28-38cm |
| XS: | 29-36cm | 36-48cm |
| SMALL: | 35-44cm | 41-54cm |
| MEDIUM: | 39-51cm | 46-61cm |
| LARGE: | 42-56cm | 57-83cm |
If your dog falls between sizes, we generally recommend choosing the larger size for additional adjustment room. You can also contact us at: hello@bewdogs.co.uk - we have a 100% success rate at fitting hard-to-size breeds.
How to Check the Harness Fits Correctly
Once your harness arrives, fit it to your dog and check the following:
You Can Fit Two Fingers Under the Straps
You should be able to comfortably slide two fingers between the harness and your dog’s body. If you cannot fit two fingers underneath, it may be too tight. If there is excessive space, it may be too loose. Our harnesses are adjustable and will usually arrive at the smallest size, so be prepared to loosen the neck or chest straps to get the perfect fit.
The Harness Doesn’t Restrict Movement
- Your dog should be able to:
- Walk naturally
- Sit comfortably
- Run and play without restriction
Watch them move around the house before heading out on a walk.
There Is No Rubbing
Check behind the front legs and around the chest after the first few walks. A properly fitted harness should not cause rubbing or irritation.
Your Dog Cannot Back Out of the Harness
Gently test the fit while holding the lead. The harness should remain secure without slipping over your dog’s shoulders.
Common Harness Fitting Mistakes
Choosing a Size Based Only on Breed
Not all Labradors, Cockapoos or French Bulldogs are the same size. Always measure your dog rather than relying on breed recommendations.
Leaving the Harness Too Loose
Many owners worry about making a harness too tight and accidentally leave it too loose instead. A loose harness is one of the most common reasons dogs escape during walks.
Ignoring Adjustments
Our harnesses feature adjustable straps to help achieve the perfect fit. Take a few moments to adjust each strap before your first walk.
Still Unsure Which Size to Choose?
If you’re between sizes or have an unusual breed or body shape, we’re always happy to help. Simply send us your dog’s chest measurement, weight and breed, and we’ll recommend the most suitable size before you order.
Shop Bew Dogs Harnesses
Our luxury dog harnesses combine comfort, security and style, with matching accessories available to complete the look.
Whether you’re looking for a classic herringbone design, luxury velvet or a complete walking set, you’ll find practical, comfortable options designed for everyday adventures.
Browse our collection today and find the perfect fit for your dog - guaranteed or we'll pay for your return.