@dlowan,
It depends on how long your legs are, Deb.
Not being a tall person, mine never quite sit comfortably on the floor.
Having your feet raised a bit, in a stable position so you're comfortable, can really help.
I was an absolute mess after the long flight from Oz to London. I shouldn't have taken my shoes off, either! Almost couldn't get then back on!
I have small ankles, but after that flight, I swear I had NO ankles what-so-ever!