This was a fun project... no measuring, no cutting, just piecing and patching together random tiny scraps of fabric leftover from other projects (such as this long dormant quilt project from a few years ago. I promise it shall return!). I just sewed the little pieces together in strips and then sewed the strips together until I had a pretty big piece of fabric, trimmed the edges to a rectangle, and sewed it to a backing. Turned it right-side-out, stuffed it (hence its slight lumpiness) and then did a terrible job making an invisible seam. Boom. Pillow.
The Real Martha will probably shudder as she reads that I didn't measure and she comprehends the imprecision of it all, but she'll get over it.