I am curious to know if anyone can shed some light on a question I have concerning the neutrino. I am refering only to the electron neutrino and not the others that have theoretical mass values. If it has not mass or charge does that mean it has no dimensions? Or because it has no mass can it have any dimension? Is there any theory on the structure or physical properties of quontum particles? I ask because I am trying to understand some fundamental structural qualities in the quantum world. Thanks in advance for your insight.