Fiber cards are perfect to save space and money. I would always buy new ribbons because I couldn’t find what I needed. Now, they are all stored by colour using these fiber cards. Can visualize very quickly what I have and it doesn’t take much space. The only negative aspect would be that the card creates creases. If I only need a small piece, it’s not an issue but if I need a long piece, I have to iron it. Personally, I find it’s a small price to pay for the convenience of this system.
I thought that these were great for all my loose fibers I had stuffed in a plastic baggie. They made my little fibers organized and I have found that I use them more now that I can see what I've got. Very glad I got these and actually used them.