A power scale of collisions with asteroids, from 50 cm in radius, to 2 m in radius, to 5 m in radius, to 10 m in radius, to 25 m in radius, to 50 m in radius, to 100 m in radius, to 200 m in radius, to 500 m in radius, to 2.5 km in radius, to 5 km (dino killer) in radius, to 50 km in radius, to Ceres, which has a mean radius of 470 km, and finally Theia, which was a hypothetical body similar in radius and mass to Mars that theoretically hit Earth and formed a ring system that theoretically coalesced into our Moon.
This video from Reigarw Comparisons gives you a good reference"