Physics only cover part of an object

I added a cube, set all the basic character controls, everything was ok.
Then I scaled the cube up by 3 on the Z axis.

With physics visuallization on, when I play the game, the red box that should be around the entire object, is still only the size of the original cube.

How to I fix it so that the entire object in recognized?

Change collision bounds to “box” in the physics panel.

I think physics scales with the size of the object but in general it is good practice to also press Ctrl-A after re-sizing to set the scale of the object to 1.