This is my size chart of all the Alien, Predator, and other species of the franchises compared. I got the Facehuggers to the Matriarch. I even added my own design of the Ultramorph (Jockey Xeno) for good meatures. Though not sure if this is accurate, I went by the heights of the creatures I found on this site, some of them I guesstimated. I'm open to adjustments.