I'm trying to do a block like the one attached. It will finish at 3", unfinished 3.5". I know for the bigger one to cut a square at 3 7/8" and slice it in half. I'm not sure about the little ones. The pattern calls for a square cut diagonally twice (yielding 4 triangles) but I only need 2 of each color, so I want to do a smaller square, cut diagonally once, and yield 2 triangles.
So what size square should I start with to yield 2 smaller triangles that all together become 3.5" unfinished?
Thank you as always!