Godzilla: Just how tall is it?

Okay, so I was just wondering if anyone had a definative response to just how tall Godzilla is?

It seems that the size of this thing fluctuates greatly from movie to movie, and from era to era.

In 1954 Gojira (that's the Japanese name) was said to be 50 meters tall, which works out to about 160 feet or so, however, in the most recent movies, up to and includeing Final Wars, the monster appears to be much, much taller, as do the things that battle against it.

Was something changed as the gnerations of Godzillas went by? Or did I miss something?

So, to reiterate, my question is: How tall is Godzilla?

Please, no one point out that this is a Japanese man in a rubber suit, therefore likely only about 7 feet tall. I am aware of this.