Well, it's hard to tell. If I look into my knowledge bank of people with strong physical presences they tend to use more dominant body language than me. They also tend to be 6 foot tall or higher, over 100 kg heavy etc. I'm smaller than that.
I tend to tread lightly, and so really from what I can tell I'm only elevating my presence temporarily; rather than keeping it high all of the time.
Now that I think about it, what I'm really saying is people with big physical presences. I don't know how *strong* my presence is.
I mean, what are you going to guage against? How can you deduce?