About 19mm in diameter, this tiny gas giant looks slightly squished because it even features the correct oblate spheroid shape of Jupiter caused by its rapid rotation rate!
At this scale it also becomes possible to mark the orbit radiuses of its four major moons on a standard piece of A4 paper. (Earth on the other hand would be 90 to 130 meters away depending on orbital orientation!)
Io: 6 cm
Europa: 9.5 cm
Ganymede: 15.2 cm
Callisto: 26.9 cm
An alternative slightly larger mini Jupiter at a scale of 1 : 5 billion is offered, with a diameter of about 27mm