I use a piece of heavy cardstock 12X12 from the scrapbooking dept folded in half. I fold the fabric over one more time, with the name of the fabric on the inside, so I can see it easily. It keeps my fabric organized and was very inexpensive. They give just enough thickness to keep them on a book shelve vertically. I wrap everything from 1/2 yard to 4 yards on them. It has worked for me for over a year, and I can get them off the shelf without moving all the other fabrics, like when they were stacked on the shelf. I buy my cardstock for this when it is on sale in big packages, and it don't matter if it is ugly or not. This is a great savings when you have about 500 pieces of fabric to display, and the thinness of the cardstock don't take up any room on the shelf, all fabric.