No more than 2 feet!!
If people floated instead of walking, how far off the ground would you be?
6 inches. I don't want to be too high to reach the pizza on the table.
Right now I'd be grounded.
If not properly anchored I'd float away.
I would go as high as I could go and see the sights.
a centimeter, I'm scared of heights
The last object of mobility,
is not for another 1,000 years or so.
Concentrate on getting rid of wheels first.
(Sky Car).