@Udae
I’m going to copy this into the Encyclopaedia, please let me know if you want anything changed. I would recommend choosing an average height for the Oru and giving that as a measurement, because, speaking as a human female who is 1.63 m, or 5’3″ tall, I have been to Japan and towered among tiny women who barely came up to my shoulder, and I have been to the Netherlands and felt my neck would strain from having to look up at everyone, including most women, all the time.
Obviously, you’re talking about an average height, there are going to be taller and shorter individuals, so it shouldn’t be a problem.