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XXSMALL Chest Circumference 13.5"-16" (NO UPPER HANDLE)
XSMALL Chest Circumference 15.5"-19" (NO UPPER HANDLE)
SMALL Chest Circumference 17"-23" (NO UPPER HANDLE)
Our FLUID harness is design to sit 3-4 finger widths behind the elbow and then around the rib cage on medium and large dogs, on small dogs, it should be adjusted to be 2-3 finger widths behind their elbow.