To start, there are a few different measurements you should get:
Chest: Measure around the body of the dog with a flexible cloth tape measure. You should be starting at the bottom of the rib cage and going up and over the back and then back down to where you started.
Neck: Wrap the tape around the thickest part of your dog’s neck and take that measurement. The part right on top of his shoulders, not where he would normally wear his collar which is narrower.
Weight: Chest and neck measurements are the most accurate ways to fit a dog.
Find your size in the chart. In most cases, the sizing ranges will overlap. For example, the neck size of a medium harness might be 16-25" while the large is 18"-30". If your dog falls within the range for both sizes on both the neck and chest, we suggest you go to the larger size.