Here are WD stars in the star cluster M4. The Chandrasekhar Limit - Gravity can overcome the electron degeneracy pressure if the WD mass exceeds 1.4 . For normal stars, larger mass means larger star.
Bigger mass means smaller star.
WD stars just continue to become cooler and cooler. There is no energy source in terms of fusion nor gravitational contraction, yet they shine. So they live at constant radius with ever diminishing T and L . In binary systems WD can show rather violent behavior. Gas can transfer from the normal star to the WD resulting in an accretion disk.