I made one a few years ago. As I recall, I did an online search for a video and chose how I wanted to do it. Used a tightly woven full sized sheet, hoping it would hold up better with use. With it folded in half, it was a good size to use atop a twin sized bed. As I recall, I sewed columns, weighed pellets to fill one "pod", stitched, then fill the next, stitch, etc. By the time it was completed, it was getting pretty heavy to hoist around but it went well and still being used. Be sure you don't hit the pellets with your needle! I don't remember the one who did the online video but that was one of her comments, too!!