In classical physics, particles are typically considered to be point-like objects with no spatial extent or shape. However, in the context of quantum field theory, the fundamental particles that make up matter, such as electrons and quarks, are described as point-like particles with no intrinsic shape.
According to our current understanding, elementary particles are believed to be indivisible and have no internal structure. They are considered to be fundamental entities, without any substructure or smaller constituents.
However, it's important to note that particles can interact with other particles and fields in ways that give rise to observable properties, such as electric charge, mass, and spin. These properties determine how particles interact with their environment, but they do not imply the presence of a classical shape or structure.
It's worth mentioning that in certain exotic scenarios beyond our current understanding, such as string theory or other speculative theories, particles could have additional dimensions or substructure. However, these ideas are still theoretical and not yet confirmed by experimental evidence.
So, in the framework of our current knowledge and theories, elementary particles are considered to be point-like and devoid of classical shape or structure.