The dimensions of a comforter should be on the package or else on-line if you order one. But I would suggest thinking of your layout and daylight situation. Initially we got a black duvet cover in keeping with the high-tech look of the International, but it just made the back of the trailer too dark. Now we have a light grey (aluminum coloured?) one that brightens up the space. I would suggest a duvet cover in the colour(s) you want, never mind the comforter, because it is so much easier just to take it off and launder it, vs. cleaning the entire comforter.