Scaling of characters

Hey all you lovely developers out there.

I am working on a project atm where you play as a big monster, and was wondering how the scaling would be best inside the engine.

As in, if we refer to the UE4 mannequin being normal size, and the monster should be as big as being able to fit the mannequin in its palm.

In the picture, I have scaled the mannequin down to about 0.25, just to get an idea of how big I want the monster.

and here’s my question: Should the monster be the same size as the UE4 mannequin’s scale 1, and everything be very tiny. Or everything be normal size as if I was making a game where you play a human, and the monsters be massive in size. What would be best compared to movement, physics and such?