As MadQuilter stated, many of the swaps use the 12" finished block. I did a quilt with the 10 minute block, using 5-1/2 squares, as the focus piece I was using was the same size. I will post that finished quilt - Strawberry Shortcake tomorrow. I have made the Underground Railroad sampler in the 6" size, and have to say that I did like the smaller pieces for a sampler. My NICU quilts are increments of the 2-1/2 squares for a 4-patch.