1. Measure around the base of the dog's neck where the harness will rest.
2. Measure the widest part of the dog's chest, just behind the armpit.
Use a soft measuring tape. Our harnesses are highly adjustable, so there is some overlap between sizes. The measurements in the table are the minimum and maximum measurements the harnesses can be adjusted to.
If your dog would fit into a small, but would be on the maximum end, we would recommend purchasing a medium to allow for growth, thicker fur or wearing a winter fleece. For any sizing advice, please contact us.