PetSafe Deluxe Easy Walk Nylon Reflective No Pull Dog Harness, Rose, Large: 27 to 40-in chest

To get the most accurate size harness for your pet, measure the girth of their chest, around the widest part of your dog's torso right behind the front legs, with a cloth tape measure. Pull the cloth tape snug, but not tight. If you don't have a cloth tape measure, you can use a piece of string and measure it with a rigid ruler afterwards. Make sure there's enough room for about two fingers between the harness and your pet's chest for comfort.

To determine what size Deluxe Easy Walk Harness your dog will need, you'll need 2 measurements. First, grab a fabric or soft tape measure and wrap it around your dog's girth, which is the widest part of your dog's chest right behind his front legs. Next, wrap the measuring tape horizontally across the front of your dog's chest until it's an inch past his front legs. Take note of both measurements and check the sizing chart to see which size best fits your dog.

You can still measure your dog! Grab his leash and wrap it around the widest part of your dog's chest. Then, measure the leash with a standard measuring tape to figure out his girth measurement.

Use the weight ranges as a guide but always refer to the chest and girth measurements when choosing the right size for your dog. If your dog happens to be between 2 sizes, choose the larger size.