Just an update. After measuring my shelves and thinking about fabric size, I decided to purchase 1000 of the 8.5x11" Magazine Boards directly from BCW. Total cost was $81.60. I also got the shirt clips from Amazon. (Thank you Marjben for suggesting them.) I don't expect these things will show up for a while, and then it will take a lot of effort to load them up with fabric, but I am looking forward to having a neater sewing room.