When it is that big is it still a grenade or is it now a bomb.

I think a grenade is a type of bomb, and therefore it would still be a grenade. I could be wrong, however.

The real question is who must it has been made for if it's still a hand grenade at that size.

Ilosia said:
The real question is who must it has been made for if it's still a hand grenade at that size.

The Daidarabotchi.