Oops. The math isn’t right after all. The long dimension is 6000 / 300 = 20 inches.

Your math is correct and makes the point I was attempting. For those interested in large “blowups” to wall-sized images the greater megapixel count typical of FF cameras may be of some advantage. As you and the previous poster point out though the advantage may not be dramatic for the pixel count differences between APS and FF cameras that are on the market today.

I’m a 7200 owner and a recent re-entrant from the film days. Seems like one obvious advantage of FF not mentioned is the ability to print to larger print sizes at 300 dpi. This really has to do with the greater megapixels generally of the FF cameras. Am I wrong about this?