three
The height of a chair is 10 feet.
The chair gets dirty, most likely. Many have found by doing it you can turn the chair rainbow colored!
A seat
6 feet
If your feet are off of the floor, then the chair exerts your total weight against you.
otterman
about 3 feet
Footrests
Office chair mats are designed to protect the floor beneath the area where an office chair has the potential to harm the flooring or carpet. Office chair mats do not consider "tired fee." because the very act of sitting does not involve the feet. Simply by sitting, feet get a break from standing/walking that is the cause of fatigue.
An ottoman is typically used as a chair to rest your feet. It is a low, upholstered seat without a back or arms, often used as a footstool.
A yard stick