The size of the entire universe is currently unknown, but there doesn't have to be a relationship with the size of the visible universe which is just a result of age+expansion it could be infinite for all we know. Or at least orders of magnitude larger than what we see.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
