How big is the universe?
About 93,000,000,000 light years, according to this animation of the scale of the universe.
From that page: a computer pixel is 0.3mm wide. A water molecule (or a Mickey Mouse head!) is 280pm wide. Alpha Centauri A is 1.5 Gm (1.5 billion metres) in diameter. The Crab Nebula, which has a pulsar I’m examining on my project, is 70 Pm or approximately 70 light years across.
Now, how are we going to colonise it all?