# Can classic charge radius formula be used to calculate the radius of muons or taus?

The classic charge radius formula $$r$$ is used commonly to calculate the radius of electrons(assuming they are spherical). My problem is: can the same formula be used to calculate radii of muons or taus and other leptons and fermions. And if not, what are the radii of muons and taus and how are they calculated? $$r=\frac{e^2}{4πε_0mc^2}$$ I want to know the radii of muons and taus, and I wonder if the classic charge radius formula given above can be used.