SD Size Filament Color Chip

thingiverse

These color chips can be stored and organized using an SD card shaped print in your printer. Many people already own an SD card holder, making it simple to store these chips. This chip also has a hole that allows you to attach it to a loop. It's possible this chip could even serve as a dummy SD card, although I have not tried this myself. The area where the contacts are located serves as a nail nick if they are stacked together.