A:Â I got the tall one because our toilet is higher than most due to back injury I have We got a low one for usual height toilets But in principle, the higher the feet are off the floor, the more squatting position you get
A:Â I'm 5'11" and the 7" one is perfect. I wouldn't get the taller one unless you're shorter than, say 5'6".
A:Â 7 to 9 inches
A:Â Depends on height of toilet, on the chair height the taller one is perfect but on standard height toilet, it is too high for comfort.
A:Â 6-8" the height of the squatty potty is perfect for me. I am 5' 3-1/2". Hope this helps.