Elizabeth Hartman's 12+2=Q pattern that I adapted to king size. The 12 is 12 fat quarters, which if you supersize it, you need more than that. The beauty and trouble with this pattern is that the 2 in the pattern name are the two sheets needed for the white space and the backing. That means no piecing for those huge spaces - yay! But - just try finding sheets that aren't sold in sets. I don't have Ikea really close and the only place I could find sheets by themselves was Target and Wal Mart and there weren't a lot of color choices. Thankfully I found this green.
ETA - If you are having your quilt done by a longarmer, check with them and make sure they work with sheets. And find the lowest thread count you can!
Margaret do an amazing job with the quilting?
Quilt name: Parisian Stripes
Pattern: 12+2=Q modified for size
Fabric line: Parisville by Tula Pink
Measurements: 110"x110" (?)