The cutting width is 18inch, it just a low arch design.
Although I don't think it would be cutting well with the blades it had on it when I got it
lol, I guess they got their money's worth from that set of blades! haha!
I did once see a couple of trashed older 4 stroke mowers at the tip, and they had similar looking well used blades on them also...lol
Cheers!