I was in search of a filament card samples with universal measures but couldn't find any. For that reason I've designed my own.
It was designed for 29mm x 65mm labels and also includes the project file for Brother label printer the same you can see in the photos.
It also includes a vertical box to store all the samples with 30 slots for usage.
It was designed for a perfect fit so the card samples didn't come loose, using the default 0.2mm profile.