You can look at pictures of space till you're blue in the face, but the actual size of the universe is really a mystery to humans. We use comparisons to absorb size for things. For example, if you were to ask how big something was, you would say "as big as a car" or "as big as a house" or something of that nature. But when talking about the universe, how do you know how big a galaxy is? Or even how big the sun is? Well, there is a large picturesque comparison of that very topic that I found on facts.fm which really puts the universes size into perspective in a way that I have never seen before. They show it as one long image that you scroll down. Well, I was unable to do that it one shot here, but I pieced together the same image that goes from monstrously huge to teeny tiny by comparing these objects to others that we may know of. It may take you a few minutes to get through it and understand it, but after a while, a light bulb will turn on, and you may find yourself with a new found respect and knowledge of just how vast the universe really is. Enjoy!