I went to the fabric store (Hancocks or Joanns) and they gave me their old bolts that they were going to throw away. I cut them in half and put my larger sizes of fabric around them. Works perfect on shelves or book cases and keeps them very organized. Looks like bolts of material at the fabric store. Once the fabric is gone off of the bolt most of the stores get the number off of the end and than just throw them away. No cost to you and works great.