Originally Posted by gengar

When in an upright position, the seat has armrests that come up and they do make the seat feel a lot narrower than it looks. You can see the armrest position in some of the pictures from jmj10's post above. I wouldn't be surprised if the 33" figure includes the armrests or was measured when the seat was in bed mode. That said, I wouldn't call it constraining or uncomfortable - perhaps just annoying.