You don't really need to compare it literally give the actual height measurements in the character creator. If you want a picture that's gonna be hard considering you can't actually make Au'Ra to have them stand next to people except maybe like a couple scenes in benchmark, and even then the cinematic camera messes up your perspective. All we have to go off of is measurements, and what's been said here is true. Female Au Ra can be 4 foot flat and shorter than even the tiniest miqo, males are taller than even the tallest highlanders, at their minimum height. At max height these guys are over 7 feet tall, they're HUGE.