Jupiter is the largest. It is the largest planet in the Solar System, with a diameter of about 86,881 miles (139,822 kilometers).
The International Space Station (ISS) is a habitable artificial satellite in low Earth orbit, with a size of approximately 357 feet (109 meters) in length and 240 feet (73 meters) in width.
Venus is the second planet from the Sun and has a diameter of about 7,520 miles (12,104 kilometers), which makes it similar in size to Earth.
Mercury is the smallest planet in the Solar System, with a diameter of about 3,032 miles (4,879 kilometers).
Therefore, the correct answer is Jupiter.