From the Neca website:
From the original 1979 movie that shocked audiences and jump-started a legendary film franchise, the Xenomorph known to fans as "Big Chap" gets the deluxe treatment!
This incredible action figure stands over 22 inches (55cm) tall, and has a hinged jaw that opens, revealing an inner mouth that extends for realistic movie action. It has almost 30 points of articulation, including double knee joints and a bendable tail, and extra attention has been paid to all the eerie details that made H.R. Giger's designs for "Alien" so mesmerizing.