How tall are the almighty tallest?

Answer 1

While there is no specific height for the Almighty Tallest Red or Almighty Tallest Purple, they are (before body reconstruction for their leader suits) the tallest of the Irken in their generation, and are of precisely equal height. They could just be taller than the next tallest Irken by an inch or a foot, it is unknown.

It is this superior height that actually makes them the leaders of their people, as has been with the previous Almighty Tallest Miyuki and Almighty Tallest Spork. The taller an Irken is, the more they are generally accepted as strong or smart, and are immediately accepted as superior to any Irken (and any other being) that is shorter.