Yes asteroids come in many different sizes - from as small as dust to bodies as big as Vesta which is 525 kilometers or 326 miles in diameter.
It isn't. The biggest asteroid wouldn't be categorized as small.
Asteroid - a small, rocky body that orbits the Sun.
They are to small
Relative to our earth? Yes.
An Asteroid
No. Asteroids are too small to be planets.
That could be one of the "terrestrial" planets, but most likely the required answer is "asteroid".
A planetoid - a.k.a. an "asteroid" - is basically a small planet.
Asteroid
An asteroid is a relatively small object in space composed primarily of rock and/or metal. An asteroid belt is a region in space around a star that has a higher then normal concentration of asteroids.
The weight of a small asteroid can vary greatly depending on its size and composition. On average, small asteroids can range from a few metric tons to several thousand metric tons.
It could be an asteroid or comet.