How to Measure Your Dog for a Harness That Actually Fits
By Muttsandhounds | Published: 2026-10-13
Category: How-to Guides
Learn how to measure your dog for a harness using chest girth and a simple two-finger check. Avoid ill-fitting dog harness signs and get a soft dog harness fit that stays comfortable.
Quick answer
Measure your dog's chest girth at the widest point behind the front legs, then check the harness size chart. A properly fitted harness should allow two fingers between the strap and your dog's body. If you're between sizes, size up for comfort and adjustability.
Why chest girth matters more than weight
Dog harness sizes are based on chest girth, not weight. Two dogs of the same weight can have very different chest measurements. Always use a soft measuring tape and measure the widest part of the ribcage, just behind the front legs. If you don't have a soft tape, use a piece of string and measure it against a ruler.
How to measure your dog step by step
Stand your dog on a level surface. Wrap the tape around the chest, snug but not tight. Record the measurement in inches or centimeters. Repeat twice to ensure accuracy. This number is your dog's chest girth. Compare it to the size chart for the harness you're considering.
Signs your dog's harness doesn't fit
Watch for rubbing under the armpits, difficulty putting it on, or your dog backing away. A harness that's too tight can restrict movement; too loose and your dog can slip out. Check for redness or fur loss after walks. If you see these signs, remeasure and adjust or try a different size.
Adjusting and checking fit
After putting the harness on, adjust the straps so it sits comfortably. You should be able to fit two fingers between the harness and your dog's body at the chest and behind the front legs. The harness should not slide around when your dog walks or runs. Recheck the fit monthly, especially for puppies.
Step-by-step harness measuring
- Gather your tools: Use a soft measuring tape or a piece of string and a ruler. Have treats ready to keep your dog still. Checkpoint: Ensure your tape is flexible and not stretched.
- Find the widest chest point: Locate the widest part of your dog's ribcage, typically right behind the front legs. This is where you'll measure. Common mistake: Measuring too far back or too close to the neck.
- Wrap and measure: Wrap the tape around the chest, keeping it snug but not tight. Record the measurement in inches or centimeters. Checkpoint: The tape should touch fur but not indent the skin.
- Repeat for accuracy: Take the measurement two or three times to ensure consistency. Use the average. Common mistake: Rushing and getting a different number each time.
- Compare to size chart: Match your dog's chest girth to the harness brand's size chart. If between sizes, choose the larger size for adjustability. Checkpoint: Always check the specific chart for the harness you want.
- Test the fit: Put the harness on and adjust straps. You should fit two fingers between the harness and your dog's body at the chest and behind the front legs. Common mistake: Leaving it too loose, which can cause slipping.
- Monitor and recheck: After a few walks, check for rubbing or redness. Re-measure monthly, especially for growing puppies. Next step: If you see signs of poor fit, adjust or try a different size.
Product facts to know
- Macaroon Check Tweed Soft Dog Harness: Macaroon Check Tweed Soft Dog Harness is made with beautiful fabric and attention to detail, as noted by a customer who received many comments. This harness combines style with comfort, and proper measuring ensures the tweed fabric sits smoothly without rubbing.
- Grey Stars Soft Dog Harness: Grey Stars Soft Dog Harness is a soft harness option available from Mutts & Hounds. A soft harness like this can be a good choice for dogs who need gentle pressure distribution, but correct sizing is key to prevent slipping.
