Princess Leah would be considered "large" when hanging out with ewoks, but medium, or even small in a town of humans.
Look at the room/sector it's called for in. How does it feel in that room? What would appear as "large in a dorm room, would definitely feel small in a large formal banquette area.
You can muscle test if it's big enough for that room...or it may tell you itself. If it falls to the floor after a while - get a bigger one.
Calling for a large, I'd look to get one with larger metal rods, rather than narrow long ones. You want it to pull up the excess energy.
Much Love, Shawn