I have a log cabin ruler, but I find it unwieldy and have gone back to simply cutting strips and cutting them to fit after sewing. I've been making a pineapple quilt using 6" squares for the last two years. I do a few blocks each month, otherwise I'd go nuts. I bought foundation papers from the Fat Quarter Shop, which sells them in 6" and 12" size. IMHO, pineapple quilts are best made using foundation paper piecing. I expect to finish my quilt in another year (or two!).