The Ottoman Empire brings to mind people worshipping footstools and hordes of footstools in siege against a fortified town. “We won’t rest until you’re all at our feet! . . .oh wait. . .”
I call something large enough that one might sit upon or use as a small table an ottoman. A smaller version, which can only accommodate a pair of feet or a very dainty butt, is a hassock. To qualify as a footstool, it has to have exposed wooden legs and is about half the height of a hassock or ottoman.
Footstool. “Hassock” and “Ottoman” sounds like what elderly people in the Midwest would call it; the same kind of people who still use words like “oleo” and “icebox”.