Degeneracy pressure can be extremely strong. Degeneracy pressure doesn't care about temperature. If I cool you off, it still isn't easy to push you into the wall. White Dwarfs White Dwarfs are stars that have no more Helium left to burn. They are a balance of Gravity versus degeneracy pressure.
Temperature is irrelevant.
The more mass a star has, the bigger the gravitational force. The increased force causes the star to get smaller . So the more massive a white dwarf is, the smaller it is. The Sun will have about 0.7 solar masses left at this point. Such a star will be about 1.2 times the size of the Earth.