I'm planning a flight on a Boeing 737-800 and need to consider the width of the under seat space for hand luggage (and this is for a specific reason so no answers/comments about over head bins please). This is for an American Airlines flight.
Specifically what I am interested in is if a window seat, the middle seat and the aisle seat have the same width for hand luggage under the seat in front.
My gut feeling says that that side of the plane curls in a bit at floor level for the window seat, but I don't know if this curling continues under the seat in front. I also have a feeling that the aisle seat has a narrower under seat width, but as I rarely fly in an aisle seat I can't clearly picture it.