Dollman

When Brick Bardo, a cop from the planet Arturus, lands on Earth, he discovers a little problem - he's as big as a doll. Brick's enemies have also come to Earth, and while Brick enlists the help of an impoverished woman and her son, the bad guys team up with a local gang. When Brick's location is leaked, he is besieged by an onslaught of curious kids, angry gang members, and his own doll-sized enemies. Now he must protect the family who came to his aid and get off the planet alive. (official distributor synopsis)