very big because it is almost 100 times the size of the earth. And also technically if you consider the fact that some astroids are as big as whole continents..
The asteroid belt, located between the orbits of Mars and Jupiter is about 180 million kilometers (111 million miles) wide. It varies between 387 million km and 489 million km from the Sun.
No. Most asteroids in the solar system are in the asteroid belt, but not all. The ones that may threaten to strike earth, for example, are outside the asteroid belt.
