Hmm. I *think* I know what you're asking... On most of the Florentine Fantasy quilts I've made, I tried to have the least amount of fabric waste. Usually this meant cutting 7" or 7 1/4" squares, because the fabric was typically 22" wide at that point, and that would give me 3 rows of blocks (7 x 3 = 21", 7.25 x 3 = 21.75"). Then the squares are cut diagonally twice (like an X) and that would give me the triangles that I would then sew into blocks.
Does that help?