Print Profile
0.2mm nozzle, 0.1mm layer, 4 walls, 15% infill
The print profile for this works fine. There could be one or two improvements. 1. infill is set to 15%, which may as well just be 100% considering the size of this object. 15% depending on the exact color of your filament can show the infill pattern. 2. I would personally enable ironing for the top layer. Again, given the size of it, ironing can really help hide the layer lines. 3. the profile is for .2 nozzle sizes, which is fine but obviously 99% of people are using .4 and ideally that would have been used here.
I printed a test print with the model scaled down just to see how it would do at a smaller size, and dimensionally it was fine but a .4 nozzle was not able to print the keychain loop. I have no doubt it wouldn't have missed the loop if the nozzle were at .2 or if the model is not scaled down.