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.
|Size||Neck Size||Chest Girth||Length|
|X-Small||9.5 inches||11.4 to 16.1 inches||6.5 inches|
|Small||12.6 inches||13.2 to 19.7 inches||7.5 inches|
|Medium||15.7 inches||15.7 to 23.2 inches||9 inches|
|Large||18.9 inches||21.6 to 43.3 inches||10.5 inches|