Size evil wolf: 22.2 x 35.9 x 31.3 mm
Size good wolf: 22.2 x 36.7 x 32.4 mm
Both these rings were sized to be a ring size of 17mm. To make sure they... will fit your fingers, check the ring size chart over here: https://www.goudkat.com/en_GB/c-4263018/ring-size-chart/
Then simple recalculate the sizes the rings should be:
(100 x your ring size)/17 (or the equivalent in your metrics system) = the percentage you should resize the rings to fit
This should in theory work, but pro tip: print only a little piece of the ring in different sizes to find out what fits you best before printing the complete ring. I included a little stl file of a small part of the ring to help find the right size.
I printed these on my Ender 3 with a Micro Swiss hotend in Esun Pla+ Grey. They don't need supports, just print them as they are with their backs on the bed. Make sure to have your fan speed at its max though, otherwise your printer may struggle a bit with the overhangs. If your fans aren't powerful enough, you can always add a little bit of support structure for the back.
My settings:
Nozzle size: 0.4
Layer height: 0.08
Initial layer: 0.16
Nozzle temperature: 205 degrees
Bed temperature: 45 degrees
Printing speed: 30 mm/s
Wall speed: 15 mm/s
Wall line count: 4
Amount of top/bottom layers: 10
Infill density: 35%