Hi Star!
Oooh this is a really interesting question! Tbh I didn't make any standard "profile" type sheets for these characters, other than figuring out their traits, combat stats, and backstories. I know their sprites are not accurate to actual size. Ruwin's height is pretty much the only one that's commented on because he's abnormally tall, like probably if you saw him walking down the street in a crowd of people you'd notice that he was really tall. I don't really have a specific number in mind only that he's sort of like a pro basketball player height, getting closer to 7ft. Deita is the shortest character, closer to 5 ft. I'll list them how I envision them in order from tallest to shortest rather than coming up with arbitrary numbers on the spot right now XD;;
Ruwin, Mikaylis, Beileph, Jonas, Ashur, Beisel, Jeth, Katnir, Eve, Lor, Miyetta, Samuel, Deita