An ottoman can vary in height. If it is part of a suite of furniture it is usually matched to the height of the sofa/couch/settee or armchair seats.[[//www.youtube.com/embed/GMwYEZSalsI|external site]] This allows the resting of feet on it comfortably while seated,  [[https://kaisercenterevents.com/author/ahead_time/page/1271/|unusual accent chairs]] and allows it to be used as an additional seat.

Armchairs and  unique armchairs uk sofas vary in height usually within the range of 275-375mm (11-15")