The present invention is directed to a method of identifying and selecting medical equipment, medication doses and/or medical supplies; and to the equipment used to carry out the method. The present invention measures a specific anatomical dimension: this dimension is correlated to a code which can be a color and/or pattern. The color and/or pattern in turn is used to identify and select medication dosage, medical equipment and/or medical supplies. In one embodiment a linear strip is divided into regions of color and/or pattern. The color and/or pattern associated with the patient's length is used to identify and select medication, medical equipment and/or medical supplies. The equipment, medication and supplies can be group by code, contained in a package bearing the code, or marked by the code. In a preferred embodiment an ultrasonic measuring device is used to determine the code associated with a patient's length. In another preferred embodiment the patient is provided with a coded identification bracelet. In a preferred embodiment a code for length in combination with a particular medical emergency and optionally a medical history are used to select medical equipment, medication and/or medical supplies.