Ton answer your question, putting the solar system to scale, it would be several kilometers wide. perhaps almost 6 or 7 miles.
To make things simpler, if the Sun were the size of a soccer ball, the earth would be the size of a pin head, Jupiter would be the size of an acorn and Pluto would be a kilometer away. In other words, the actual scale is too big to appreciate with planets this size. Just make it fun.