Designed to ensure a snug fit, the Accoson pre-measured blood pressure cuff is supplied complete with range finder to help the user select the correct size cuff for the patient's limb. Each pre-measured cuff is marked with the upper and lower limits of limb circumference to which the cuff is suited. The leading edge of the rubber bag compartment should engage within the limits of the range finder when the cuff is positioned on the patient's limb. If not, then a larger or smaller cuff should be used. Using the correct size cuff is most important when attempting to achieve accurate readings.