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||Back Length||Neck Size||Waist Size/Chest Girth||Strap Width|
|X-Small||3.75 inches||10 - 12 inches||15 - 17 inches||5/8 inch|
|Small||5.75 inches||10 - 14 inches||15 - 20 inches||5/8 inch|
|Medium||7 inches||14 - 20 inches||22 - 27 inches||3/4 inch|
|Large||8.5 inches||18 - 26 inches||27 - 38 inches||1 inch|