A harness that fits poorly is worse than no harness at all — it can chafe, allow escape, or give you zero control on leash. Getting the sizing right is the most important step before you buy. Here's exactly how to do it.
Step 1: Measure Your Dog's Girth
Girth is the measurement around the widest part of your dog's chest, just behind the front legs. Use a soft tape measure and keep it snug but not tight — you should be able to slip two fingers underneath. This is the most important measurement for harness fit.
Step 2: Measure Neck Circumference
For step-in and vest-style harnesses, neck circumference matters too. Measure around the base of the neck where a collar would sit.
Step 3: Note Your Dog's Weight
Weight is a secondary reference — size charts use it as a starting point, but girth always takes priority. Two dogs of the same weight can have very different builds.
How to Read a Size Chart
Always cross-reference girth and weight. If your dog lands between sizes, size up — a slightly looser fit is adjustable; a harness that's too small cannot be made to work safely.
Signs of a Good Fit
- Two fingers slide under every strap without forcing
- The harness doesn't shift side to side when your dog walks
- Your dog's shoulder blades move freely — no restriction mid-stride
- The chest plate sits centered on the sternum, not riding up into the throat
Signs It Doesn't Fit
- Skin bunching or rubbing under the armpits
- Front legs catching on the harness when trotting
- You can pull the harness over your dog's head with moderate effort (escape risk)
Breed-Specific Considerations
Deep-chested breeds (Greyhounds, Whippets, Dobermans): girth and neck proportions are very different — always size by girth, ignore weight entirely.
Barrel-chested breeds (Bulldogs, Pugs, French Bulldogs): look for harnesses with wide chest panels and extra adjustment range.
Thick-necked breeds (Pit Bulls, Staffies): a back-clip harness removes neck pressure entirely, which is ideal.
Ready to Shop?
Once you have your measurements, browse our Harnesses collection — each product page includes a full size chart. Our BEG Voyager Pop Series Harness is our top-selling style, built with padded straps and dual adjustment points for a precise, chafe-free fit across a wide range of builds.
Still unsure? Reach out — we're happy to help you nail the fit before you buy.
0 comments