In the days BC (Before Computers), we kept track of contacts' information on a large Rolodex card file. I was surprised to find that Rolodex card files are still available at Amazon and local stationary stores.
The filament swatches are designed based on the two-rail Rolodex file system. This swatch case adds sides and a hinged top to the basic holder.
Each sample swatch can be printed as a plain card and magic marked with appropriate data, or you can add your own text to the card design in Fusion 360. Swatch/Card Files are provided in my "Filament Swatch File (1).
I found that printing in Vase Mode provided a viable swatch that is quite flexible and robust.
The standard Rolodex card is 4" x 2-¼". I found this a bit large, so reduced that swatch to ~3" x 1-5/8". I did not change the Rolodex rail size or position.
The author marked this model as their own original creation.