GNU OS logo key chain.

Dimensions: 37 mm diameter and 3 mm height
 

Print time is more or less around 25m at 0.16 layer heigh (0.4 mm nozzle).

Print parameters:

• Layer height - 0.16 mm or 0.12 mm
• Perimeters - 3
• Infill - 10% honeycomb
• Brim - NO 
• Support - NO
• Raft - NO
• Filament type - PLA or any

Could be printed in multicolor without MMU, AMS or similar.

For multicolor print:

When printing at 0.16 layer height: put the printer in Color Change mode(G-code M600) at layer 16 and then change filament
When printing at 0.12 layer height: put the printer in Color Change mode(G-code M600) at layer 21 and then change filament

Enjoy!