Nine patches are the ultimate all-purpose grid for quilt blocks. It also just so happens that it is a size that works out beautifully for Tiny Tuesdays 5 inch blocks (4.5 inch finished). Before you dismiss the humble nine patch, start to think about some of the classic quilt blocks that are built on a 3 by 3 grid. Churn Dash. Ohio Star. Friendship Star. The list could go on. I'll show you the basic nine patch first and then Shoo Fly, which is a nine patch with half square triangles in the corners.