The log cabin rulers are marked with both a letter and the actual length in inches for each strip-just the lines you need, so there's no distraction, no confusion, no unnecessary information.
Finished strip widths are 2:1 on both rulers, so you can make strips from both sides to make off-center log cabin blocks.
Each ruler comes with instructions for cutting strips the correct width and chain piecing blocks.
We think you'll be amazed at how much easier it is to piece log cabin blocks from exact size strips, rather than sewing long strips and cutting off the excess (sometimes crookedly).