Physicists think they've resolved the proton size puzzle

Now on to the more serious problem: The size of the electron. In physics it's considered a point with a diameter of zero. The experimental upper bound is 10^-22m; it must be smaller than this. Some have theorized that its actual diameter is far below the Planck Length, possibly even under 10^-90m. It's an open question as to whether the electron's diameter can ever be resolved experimentally, and the laws of physics strongly suggest that the answer is that it observation or measurement are impossible even in principle.

...Even the proton's new 0.841 femtometer diameter, smaller than previously assumed, is absolutely enormous in comparison.