Just the doors, which are about 30”, unfortunately not much in the house is standard, lol.All the Woodstocks are cats or hybrids, and don't have convective jackets and blowers. You'll be able to heat more air faster, then move it around, with a jacketed stove with blower.
Is there a hallway in the center of the house, running parallel to the stairs, or just the doors we see? Are those doors standard width, like 30 or 36", or are they wider?