Attempting to measure X-ray images after they have been taken can result in inaccuracies. X-ray rulers are an easy and effective way of labeling the actual size of body parts and areas of concern in the image. Radiopaque rulers can be used during X-ray procedures, leaving a clear measurement right on the X-ray image. We offer a few types of X-rays rulers, including one constructed from a high-performance chemical that can be disinfected with ethylene oxide or alcohol. These extremely flexible X-ray rulers are almost impossible to break while the radiopaque ink leaves a clear, lasting mark on the radiograph.