Are electrons smaller or larger than protons?
That question has no meaning. In weight, the electron is much lighter than the proton. But the size of an electron is not a quantum concept.
The electron is not a ball with a well-defined surface. It is treated as a point particle, in the quantum sense, that is it has wave properties. Its weight is much less than that of the proton, which is not an elementary particle but is made of quarks and gluons,