Why does the solubility of alkaline earth metal hydroxides in water increase down the group?

(N/A) In alkaline earth metal hydroxides,the anion $(OH^-)$ is common,so the cationic radius influences the lattice enthalpy. As we move down the group,the cationic size increases. The lattice enthalpy decreases more significantly than the hydration enthalpy with an increase in ionic size. Consequently,the solubility of these hydroxides increases down the group.