That would be Uranus. Uranus has a diameter of about 51,000km, making it the third largest planet in terms of radus/diameter/volume etc. but it's mass is only 15 times that of Earth, less than Neptune, making it the fourth largest in terms of mass.
Uranus is the 3rd to largest planet.
Saturn has a radius of 36,184 miles (58,232 kilometers). This makes Saturn the second largest planet in the Solar System, after Jupiter.
The largest planet in our solar system is Jupiter with an approximate radius of 70,000 km (smaller in the polar direction, larger in equatorial due to its spin). The largest planet known might be the exoplanet (outside the solar system) called TrES-4 and thought to be about 1.7 times the size of Jupiter - but ithe definition for it and even potentially larger planetary candidates is still a subject of debate since it fits the characteristics of a brown dwarf (a type of small star) and the distinction begins to blur somewhat as a planet's size becomes large enough.
Its the third-largest and fourth most massive planet in the solar system.sources:http://en.wikipedia.org/wiki/Uranus
Neptune is about 3.8 times the size of Earth in terms of its equatorial radius. It is the fourth-largest planet in our solar system by diameter.
Jupiter is the largest planet and therefore has the largest radius. The radius of Jupiter is 43,441 miles (69,911 kilometers).
Uranus is the 3rd to largest planet.
In our solar system, Jupiter is the planet with the largest radius of 71,492 km It has a mass of 1.8986×1027 kg
Saturn has a radius of 36,184 miles (58,232 kilometers). This makes Saturn the second largest planet in the Solar System, after Jupiter.
Neptune with an equatorial radius of 24,764 about 3.88 that of the Earth [See Link]
The largest planet in our solar system is Jupiter with an approximate radius of 70,000 km (smaller in the polar direction, larger in equatorial due to its spin). The largest planet known might be the exoplanet (outside the solar system) called TrES-4 and thought to be about 1.7 times the size of Jupiter - but ithe definition for it and even potentially larger planetary candidates is still a subject of debate since it fits the characteristics of a brown dwarf (a type of small star) and the distinction begins to blur somewhat as a planet's size becomes large enough.
Jupiter is that planet.
Jupiter is the largest planet, with an equator radius of ~71,492km and polar radius of ~66,854km. Jupiter also has a huge mass, which is 2.5 times that of all the other planets in our solar system put together!
Jupiter is the largest planet in the solar system with a 71,492 mile equatorial radius (11.209 times larger than the earth).
Jupiter has the largest diameter (the radius is half the diameter, of course).
Planet X has not been confirmed to exist, so its size is unknown. Jupiter is the largest planet in our solar system, with a radius of about 69,911 km.
Its the third-largest and fourth most massive planet in the solar system.sources:http://en.wikipedia.org/wiki/Uranus