So I recently re-watched invader Zim and it made me wonder... what is going on with The Tallest's getups? It looks like they have all the same visible limbs as the regular Irken, the only change being the added waist, forearms and backpacks. I heard them say in an episode "ever since we became the tallest" which made me think "haven't you always been?". They could be referring to having grown, but it seemed more like they were referring to an event that happened to them suddenly and simultaneously. Could it be that they are regular Irken that have extended their limbs in order to impose a false order on their peers?
All of the other Irken are nearly the same size except the Tallest, who are 2-3 times as big as everyone else:
The facts from the Invader Zim wiki:
Along with Purple, Red's design and body structure is much different from that of a normal Irken. He has a slender build. His arms end in unusually bulgy gauntlets, he has only two thin fingers (instead of the normal three for an Irken), and an unusually thin waist and neck. His feet may also be different from that of an average Irken, but it is hard to tell since he is always levitating. This appears to be the case for all of the Tallest, as concept art of Almighty Tallests Miyuki and Spork showed them as having the same design.
Both Tallests were re-designed in the middle of the first season; Jhonen Vasquez decided to make their torsos thinner, as well as other major updates to their suits and overall physical appearance. Ever since this modification, speculations have arisen that that they might not really be taller than other Irkens, have robotic bodies, or that these differences are merely special modifications given only to the Almighty Tallest. It has been stated by the Invader Zim crew that the Tallest have their thumbs chopped off in a ceremony.
What do you guys think?