What is the approximate radius change a Sun-like star experiences when expanding into a Red Giant?

Answer

Its radius can swell perhaps a hundred times its Main Sequence size.

The text states that for a star like the Sun, the expansion during the Red Giant phase can cause its radius to swell by about a factor of one hundred compared to its size on the Main Sequence.

What is the approximate radius change a Sun-like star experiences when expanding into a Red Giant?
astronomystarsstellar evolutionred giantsLuminositymain sequence stars