At my Bee meeting last month the "Disappearing 4-Patch was taught.
The starting squares were 4.5 inches.
You cut 1 inch from both seams and then scramble the narrow pieces around until you get the block on the right.
So when I went home I had three of these made "correctly" and four remaining 4-patches that hadn't been cut yet. I took them on retreat thinking I would just "gitterdun" and made into a tiny baby quilt for our neonatal unit.
But I made a slight cutting mistake, and just sewed it together anyway. After I looked at it, I began to PLAY.