If you're like me - you're just now working on the block of the month. Just a helpful hint for those who don't like math.
The half square triangles need to be squared up to 4.5"' squares
The 2 rectangles when sewn together should be 4.5" squares
the Center background block should also be 4.5"square.
The sample block shows a white color for the background and a dark brown or dark matching color for the other half of the rectangles.
The total block should measure 12.5" unfinished or 12" finished.