The Icy Satellites and their diameters:
The Icy Satellites are practically spherical and have diameters that vary between a few hundred to a few thousand km.
Ganymede is the largest satellite of the Solar System and Titan is the second largest.
The considerable thickness of the atmosphere of Titan gives it an apparent diameter that is larger than Ganymedes.
In the following frames, the satellites are show to a common scale and in order according to their distances from the parent planet.