@Justalittlegirl: It could be smaller in volume but it would need to be denser. A neutron Star for example is the size of a city yet it has gravity billions of time greater than Earth's.
Naruto just a few years ago was a good match up with HxH
R1. Gohan blows them up
R2. Gohan blows them up
R3. Gohan gets torn to shreds