big as life
big as life or large as life {adj. phr.}
1. or life-size
The same size as the living person or thing.
The statue of Jefferson was big as life.
The characters on the screen were life-size.
2. or big as life and twice as natural {informal}
In person; real and living.
I had not seen him for years, but there he was, big as life and twice as natural.
Categories:
Source: A Dictionary of American Idioms