For Chihuahuas, the most important consideration in a harness is fit: their tiny chests and necks require a harness that adjusts closely without gaping or chafing. Our editorial team compared dozens of harnesses to find options that won’t slip off or put pressure on a Chihuahua’s delicate trachea.

Look for lightweight, step-in or vest styles with soft padding, and avoid anything bulky that could restrict their short legs. We focused on real-world reviews and brand reputation, not lab tests, to bring you honest recommendations.