Hello, this is my design to help remember which nozzle size you're using. It's designed for the Ender 3 series (I have the pro).

If you want it to be multicolored, you have to add a filament change to the height where the numbers start printing.

You may have to use glue to connect the "Nozzle swap counter body 1" and "Nozzle swap counter body 2".

You will need:
-M3x10mm screw: 2 pieces
-M3 nut: 2 pieces

Note: You won't be able to use wider bed leveling wheel with this model than the original ones.

If you don't mind, please download it from my printables profile and leave a like if oyu liked it. https://www.printables.com/model/533431-nozzle-swap-counter