Does superposition have a radius or a space covered distance which cuts off at a certian point based on the size or coherance of the object. I understand it is a statistical distribution like a blanket of qm possibility as to where the object or particle can collapse. But is there a cut off point or does superposition cover the entire known universe and its just a matter of probabilitys as to where the particle or macro object will be, collapse into. Im confused because I know macro objects like myself have a wave function which is extremely small compared to the size of the macroscopic world. My personal wave function is much smaller than any currently measurable sizes. But is there a statistical cut off which renders the probabiliity insignificant or is there always a probability I could be in china at this very moment. Im sorry for all the qm macro questions the help is much appreciated.