I was looking at your pattern again and if you've not read the ratings and reviews, you might want to. Someone else commented on it being small. Using size 15 needles they said they ended up with about a 40" square.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper