I go to JoAnn's and I ask for the empty cardboards from fabric. I take whatever they give me home and with a sheetrock cutter and a ruler and I cut them to the size I like. Usually that is to cut the ends before the fold (2) and then I use 1 of those to cut the long piece before the fold as well. 4 per board and all free. I don't use the ones from the quilt shop because they are doubled and take up too much room on the shelf with fabric on them. By the way I store my fabric on bookshelves in colors.