If the earth was the size of a golf ball how big would the universe be?
I'd say that if the Earth was the size of a golfball, the universe would be as big as the entire solarsystem.
However, we do not know how big the universe is, so there is no right answer to your question. It could be even bigger. Just understanding how big the solarsystem is is unimaginable without numbers. And there are billions of solarsystems... in just one galaxy... there are billions of galaxies. And the distance between each one is tremendous.
Now can you imagine..?