I cant tell if their origins fit the model, but they're like a huge circles around my model. I tried scaling one, but it also moves away. Didnt try scaling all of them at once, just thought of it...

*** EDIT ***

I tried selecting more than one bone, but it doesnt allow, so I cant scale all bones together.
I scaled only one bone, in just one direction, but it moves down and at some point becomes like a triangle...dunno what's happening there.

Here's a link to the exported .FBX file from .max (note, bones are Biped Objects and converted to bones on export to fbx).
HumanCasualRigged.fbx