A good fit is more useful than a familiar size label. Adjustable dog harnesses let you fine-tune the straps within each design's stated range, making chest and neck measurements the starting point for choosing everyday walking gear.

Compare adjustment points, strap placement and the product size guide to find a suitable shape for your dog. Recheck the fit after adjusting, and regularly as your dog grows or their body shape changes. An adjustable harness still needs to be the right size.