I prefer patches for half square triangles (#4 and #5, noted with ** in the chart below) that are oversized by 1/4", sew the units and then cut down to perfection. So for a #4 listed as 2-3/8"x2-3/8", I actually cut it at 2-5/8"x2-5/8".
Use the Windmills quilt block pattern to make blocks that finish at about 10-1/2" square. Six Windmills quilt blocks are shown in the illustration. They've been rotated from row to row and you'll discover other ways to rotate the blocks to create unique layouts.