From The Collaborative International Dictionary of English v.0.48 [gcide]:
life-size \life"-size`\, life-sized
\life"-sized`\(l[imac]f"s[imac]z`), a.
Of full size; of the natural size; of the same size as an
original; as, a life-size sculpture; a life-size portrait of
the general.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
life-sized
adj 1: being of the same size as an original; "a life-size
sculpture" [syn: life-size, lifesize, life-sized,
full-size]