A device designed to superimpose a reference grid over an x-ray image during an orthopaedic procedure (e.g., surgery). It is a flat plate made of x-ray translucent material with a grid that is not translucent and therefore shows up on the x-ray image. It is only intended to assist alignment of anatomical structures (bones) and is not intended to take an accurate measurement of length (i.e., not an x-ray ruler). This is a reusable device.