I love buying ribbon, but sometimes it's hard to remember what I have. I found a set of three of these hangers at the store for $3.99. They are meant for hanging slacks. They are very sturdy and the foam holds the spools really well.
Each hanger holds at least six spools of ribbon. I have tried storing it in plastic boxes, but I think this is the easiest way to store it, to see what I have, and to get to it when I need it.
