I was wondering this as Im sure people must have different perceptions of what is medium, low and high. Seems a curious question to ask, even by my standards!
As far as I can think, anything including 4" and over is high (with anything over 5" being in the "avoid the stairs at all costs" range), anything between 3 and just under 4 being medium and anything under 3" being low.
Anyone agree or disagree?

As far as I can think, anything including 4" and over is high (with anything over 5" being in the "avoid the stairs at all costs" range), anything between 3 and just under 4 being medium and anything under 3" being low.
Anyone agree or disagree?