It is 8th largest on planet size after Mars.
By size, it's the smallest planet. In fact, Jupiter's moon Ganymede and Saturn's moon Titan are both bigger than Mercury.
The planet Mars is 7th in the rank in size.
Venus ranks third in order of size. Both Mercury and Mars are smaller.
It is the smallest planet in the Solar system.
The smallest planet is Mercury. Mercury's diameter is 4,879 km- Earth's is 12,756.
Mercury is the closest planet to the Sun. It has a diameter of 3,032 miles, or 4,879 kilometers. It is the smallest planet.
Mercury
Jupiter is the fifth planet from the sun, after Mercury, Venus, Earth and Mars.
Gravity ("surface gravity")on Mercury is 0.38 that of Earth.
There is no planet that is one fourth the size of Earth. The closest is Mercury at 0.38 that of Earth.
Mercury is the closest to the sun.
Mercury