How Dog Harness Should Fit
At SLEDLINE, we know a harness that doesn’t fit properly can make walks stressful for both you and your dog. A well-fitted harness should feel snug, never restrictive, and give your dog the freedom to move comfortably. Below we’ll show you how to measure, fit, and adjust a harness so your walks are safe and enjoyable.
Why Harness Fit Matters
A harness that’s too loose means your dog can slip out. Too tight, and it can rub, restrict movement, or even cause injury. Getting the fit right protects your dog, makes handling easier, and builds a positive walking routine.
How to Measure Your Dog
Before buying, measure your dog properly.
Place fingers just behind the front legs:
4 fingers for medium/large dogs (sizes 0–4).
2 fingers for small dogs (Baby 1–2).
Wrap a fabric tape measure around the chest at that point.
Keep it snug — not loose or tight.
Note the chest size where the tape meets.
Fitting the Harness
Once you’ve got the right size, check the fit in three areas:
Check 1: Tightness
You should be able to slide two fingers between your dog’s back and the harness.
Check 2: Bottom Strap
The belly strap should sit:
4 fingers behind the front legs (sizes 0–4).
2 fingers behind the front legs (Baby sizes).
Check 3: Top Strap
The chest strap should sit across the chest:
Too high → presses into the neck.
Too low → drops toward the legs and risks slipping off.
Adjusting the Harness
Open the strap, loop through the ring, and close securely.
Adjust straps to fall between the min and max guide.
Check again with the two-finger rule on the chest.
Too loose = escape risk.
Too tight = rubbing or chafing.
If Your Dog Tries to Back Out
Stay calm — don’t yank the leash.
Recheck strap positions and tightness.
Make sure the top chest strap is neither too high nor too low.
How to Put On a Dog Harness
Step 1: Identify the Style
Step-in harness → dog’s paws go through loops.
Over-the-head harness → neck loop slides over, straps clip under.
Car harness → padded with extra restraint points.
Step 2: Prepare Your Dog
Loosen all straps first.
Let your dog sniff the harness.
Reward with treats to create a positive link.
Step 3: Position Correctly
Step-in: guide paws into loops and pull straps up.
Over-the-head: slip loop on, guide chest strap around the body.
Make sure the D-ring is in the correct place (back or chest).
Step 4: Fasten & Secure
Clip the straps securely. Check for tangles or twists.
Step 5: Adjust for Comfort
Two-finger rule applies again.
Make sure nothing rubs under the arms or shoulders.
Common Mistakes to Avoid
Picking the wrong size.
Skipping adjustments before walks.
Allowing straps to twist.
Using the wrong D-ring.
Tips for Nervous or Small Dogs
Choose step-in harnesses to avoid going over the head.
Let your dog explore the harness first.
Use treats and calm praise throughout.
Training Dogs to Wear a Collar, Harness, and Lead
Collar: Introduce slowly, reward, and build duration.
Harness: Same process — step by step, with rewards.
Lead: Start indoors or in the garden, reward light pressure, and practise recall.
FAQs About Dog Harness Fit
Q: How tight should a dog harness be?
A: You should always be able to slide two fingers between your dog and the harness.
Q: Should the harness sit on the neck?
A: No. The top strap should sit across the chest, not on the neck.
Q: Can dogs escape from loose harnesses?
A: Yes. A loose chest strap makes it easy for dogs to back out of a harness.
Q: Are step-in or over-the-head harnesses better?
A: It depends on your dog. Step-in is good for nervous dogs, while over-the-head is usually faster to fit.
FAQs About SLEDLINE
Q: What makes SLEDLINE different?
A: SLEDLINE builds leads and dog gear for sled, mountain, and working breeds. Our focus is strength, control, and durability.
Q: Where are SLEDLINE products made?
A: Every lead is handmade in the UK with tested, durable materials.
Q: Can SLEDLINE leads help with pulling?
A: No lead will solve pulling on its own, but SLEDLINE designs give better control and feedback, so your training works faster.
Ready to improve your walks? Check out the SLEDLINE Heritage Line and Control Line for durable, handmade leads that pair perfectly with your dog’s harness.
