system
Given the following post, respond as if you're commenting on Reddit:
human
[Alien] how big can a xeno get?

 Let's say a face hugger impregnated a t-rex. Maybe the FH flew up into it's mouth from an egg. Maybe the poor t-rex ate a bunch of eggs. Will the xeno be as big as the t- rex?
gpt
Their size is essentially unlimited, given that the egg leaches from the hosts body like a cancer while also assimilating the hosts DNA and abilities. Like it's been said, it is entirely dependent on hosts, a Xeno could be birthed from a blue whale, the largest creature to ever live on earth, it would just be a huge aquatic whale-xeno.