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Protons have a diameter of 1.6 to 1.7×10−15 meters.

The electron is known to be a point particle up to an upper limit of 10-18 m. It does not conventionally have a size. So it is impossible to compare the size of the proton to that of an electron.

The MASS of the electron is 1/1836 of the MASS of a proton. This does not however tell you anything about their relative dimensions.

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