The image above recently posted by The Planetary Society is labeled "Every round object in the solar system under 10,000 kilometers in diameter, to scale." This impressive collection represents 2 planets, 18 or 19 moons, 1 or 2 asteroids, and 87 "trans-Neptunian" objects.
You can see how the moons Ganymede and Titan outside Mercury, and our own Moon exceeds the size of Pluto.
The image below shows the objects we have already visited, including the recently explored Ceres and Pluto. We are making great progress in our explorations of the solar system.