This is based on @Manuel's beautiful low poly ring design. I have bigger fingers, so I wanted a wider version of his ring.

This is a quick ring to print. It takes me 15 minutes to print this ring on my Prusa i3 MK3s+. I've saved different STL files that are ready to be printed with different diameters/sizes. 

Print settings:

• Nozzle Size: 0.4mm
• Layer Height: 0.2/0.1mm (I suggest to print at 0.1 layer height for a cleaner aesthetic result) 
• Vertical Shells: 2
• Top/Bottom Layer: 4
• Infill: 10%

I didn't use a brim, but some might find a brim is needed. I'd like to try this print with a .25mm nozzle in the future. 

In the pics, the wider low poly rings are printed in Prusament PLA Oh My Gold & Viva La Bronze. The wider multicolored low poly ring is printed in Amolen PLA Triple Color Silk PLA Filament in Red Green Blue. The skinnier low poly ring by @Manuel is printed in Prusament PLA My Silverness.