Abstract: A leg length inequality measuring device is provided to quantitatively determine one of the signs of postural imbalance. The invention device is for use by chiropractic practionters. Both legs are usually of the same length, but when the skeleton of a patient is out of alignment an appearance of differing leg lengths is presented, and the cause and treatment are decided by determining accurately if there is a difference in leg length. A convenient and reliable device for this purpose is in the form of a solid rectangle with stepped or V-shaped edge slots arranged with a pair of such slots running across the top surface thereof, and the other slot running perpendicular to the two cross-slots and along the length of the bottom face of the item. The two cross-slots are for accommodating sliding measuring slabs to various positions in order to determine the difference in leg length measurement for each leg, as the patient lies on his or her belly with heels against such slabs.