It depends on how much you mean by small. Comets, the smallest rocks orbiting Sun, are closest to Sun. Asteriods, orbitting Sun along the asteroid belt between Mars' and Jupiter's orbits, are still small but bigger than comets. Planets and natural satellites are also rock and orbit Sun but are a lot bigger.
asteroids
comets
It is an asteroid.
They are asteroids.
An asteroid.
Asteroids.
craters
asteroids
It is an asteroid.
They are asteroids.
Meteorites
the small rocky bodies that vole around the sun are called plantets
An asteroid.
Objects smaller than planets and dwarf planets, which are not moons, are called asteroids.The smallest are called meteoroids, especially when they encounter a larger body, and micrometeoroids if they are as small as grains of sand or dust, or even smaller.(because of their low mass, micrometeors can survive atmospheric deceleration to reach the surface)
Asteroids.
rocks
Asteroids are small rocky bodies that orbit the sun, most of them between the orbits of Mars and Jupiter. Meteors are the phenomena of very small bodies burning up in the atmosphere.
You call them stones.
Be more descriptive.