27x41” one-sheet poster for 1957 Columbia sci-fi film that featured the amazing stop-motion animation of Ray Harryhausen that introduced the world to the creature known as Ymir. Large reptilian-like profile at right of poster suggests Ymir’s growing condition and “Out-Of-Space Creature Invades The Earth!” tagline. Shows panicked couple and city in flames. Folded as issued with a few tiny .25” tears along bottom margin. Could be framed for an Exc. display.