Description
Perfect Fit Dog Harness 40mm
The Perfect Fit Dog Harness 40mm is a comfortable, fleece-lined, three-piece walking harness designed for dogs who need a secure, adjustable fit without pressure around the throat.
This 40mm harness is commonly chosen for large dogs who need more structure than a 20mm harness.
40mm refers to the width of the strapping (the fleece extends to about 60mm) and only 40mm parts can be interchanged together
Some of the breeds that take the 40mm size
- Golden Retriever
- Rottweiler
- Labrador
- Amstaff
- German Shepherd
- Mastiff
- Bulldog
- Need a comfortable everyday walking harness
- Needs a harness with a Y front to allow free range of movement in the Shoulders
- Pull or become strong on lead
- Dislike harnesses going over their head
- Have slipped or backed out of other harnesses
- Need a better fit across the chest, shoulders and girth
- Are still growing and may need individual pieces changed over time
- Are working through training with a dog trainer or behaviour professional
- Top Piece — sits across the back and over the shoulders
- Front Piece — sits across the front of the chest between the front legs
- Girth Piece — wraps around the body behind the front legs
If your dog trainer, vet or behaviour professional has recommended a Perfect Fit Harness, this page allows you to select the individual Top, Front and Girth sizes needed to build your dog’s harness.
Is the 40mm Perfect Fit Harness right for your dog?
The 40mm harness may suit dogs who:
How the three-piece sizing works
Unlike standard harnesses, the Perfect Fit Harness is made from three separate pieces:
Each piece is selected separately, which means your dog may need a different size Top, Front and Girth. For example, a 40-L-M-XL means a 40mm Large Top, Medium Front and XL Girth.
Before you order
Please measure your dog’s girth with a dressmakers tape or similar. The girth is the largest part of the body behind your dog’s front legs.
Measure first. Order once. Fit properly.
If any parts aren’t the right size, we will send you another part until you get it perfect then send back what you don’t need.
If your dog is a strong puller or sits between harness widths, we may recommend choosing the larger size range. If you are unsure, please contact us before ordering.
Important stock and fitting notes
Please note: stock levels can vary, and some harness parts may need to be ordered from overseas.
Colours marked as Special Order may take approximately 3–4 weeks to arrive.
Fittings are currently on hold. Please call 0405 142 707 to discuss sizing requirements before ordering if you need help.
Why dog trainers recommend Perfect Fit Harnesses
The Perfect Fit Harness is often recommended by trainers, vets and behaviour professionals because it is soft, adjustable, secure and does not need to be pulled over the dog’s head.
It includes a rear D-ring and a front D-ring. The front D-ring should be used with a double-ended lead, not as the only lead attachment point.
Because each section can be purchased separately, you may be able to replace only one piece if your dog grows, changes shape, or if one section becomes damaged.






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