The sizes of stars differ significantly among themselves: there are dwarfs, giants and ordinary stars, of which the majority. Measurements have shown that the size of white dwarfs is several thousand kilometers, and the size of red giants is comparable to the size of the solar system.
The smallest stars are much more massive than any planet in the solar system. The masses of the stars are in the range from 0.1 solar masses to several tens of solar masses. Thus, the masses of stars differ by only a few hundred times.
The luminosities of stars are also very different from each other.
The density of stars depends more on the size of the star. The giant stars and supergiants have a much lower density (5-10 mg / m3) than the leading and small stars. Dwarf stars are the leaders in density (their density varies from 900 to 1011 kg / m3).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.