Hmmmmm, I would think that would be a standard size for a Word document. I certainly always printed non-court documents on that size paper. Then again, of course, printed documents have a 1" margin all around, where images might not. I wonder if you could get the whole image in if you change the margins to 0.
I used to have Open Office on my old laptop years ago, but haven't tried Kingsoft, so don't know how different it is. This puppy came with the MS suite, though only Word and Excel were still usable after the first month, unless you paid for it.
Anyway, I'm off here for the night. If I think of anything else, I'll let you know tomorrow, unless you come up with something in the meantime.