🎽 Dog Harness Size Calculator
Measure your dog for a well-fitting harness that prevents chafing and provides control.
Measure around the widest part of the ribcage behind the front legs.
Measure where the collar would sit, keeping the tape snug but not tight.
Fit tip
You should be able to slide two fingers between the harness and your dog’s body. Adjust straps evenly.
How to Use This Calculator
Measure carefully
Use a soft tape measure while your dog stands. Take multiple readings for accuracy.
Enter measurements and units
Select inches or centimeters, then input chest girth and neck circumference.
Compare with brand chart
Use the suggested size as a starting point. Always confirm with individual manufacturer sizing charts.
Formula
Harness size ≈ Match measurements to manufacturer girth & neck ranges
Allow 2–3 cm (about 1 inch) slack for comfort; tighten straps evenly to prevent rubbing and to maintain safety during walks.
Full Description
Harness fit impacts your dog’s comfort and control during walks. A well-fitted harness distributes pressure across the chest instead of the neck, reducing injury risk. Use this calculator as a starting point, then try on harnesses and adjust straps for a snug fit.
Puppies and growing dogs may need adjustable or modular harnesses. Regularly recheck fit to accommodate seasonal coat changes or weight fluctuations.
Frequently Asked Questions
Where should a harness sit on my dog?
The chest strap should sit mid-chest, not across the throat. The girth strap rests behind the front legs with minimal rubbing.
What if my dog is between sizes?
Size up for comfort and adjust straps. Some brands offer intermediate sizes or custom options.
How tight should the harness be?
You should slip two fingers under each strap. Tighten evenly to prevent shifting during activity.
Do different harness styles fit differently?
Yes. Step-in, over-the-head, and no-pull harnesses have unique sizing. Always reference the brand’s chart.