It's not easy being green.

In six decades, the radioactive behemoth known as Godzilla has rampaged through 28 Japanese films (and two American versions — one best not to mention). He's evolved from a metaphor for nuclear weapons into a children's hero and back again, fighting robots and aliens along the way. This year, he'll return to theaters for a new, city-smashing adaptation.

Everyone knows Godzilla is big. But just how big? Check out the graphic below to see how the big green guy has grown through the different phases of his carnage-spreading career.

Godzilla opens May 16.