Slight update- I changed the design a little to get a more graceful transition from the top of the head to the loop.  Yesterday's design is also in the rsdoc file.

This is a redesign of a key fob / zipper pull / luggage tag that I posted to Thingiverse about a year ago.  This one has a thicker, stronger loop to ensure it can take a LOT of abuse, and the base now conforms to the outline of the face, making it look a little nicer.

I sliced in Cura, 0.2mm first layer, 0.1 mm layers for the rest, 30% infill, 0.8mm shell thickness with 0.35mm nozzle.

You can make the surface super glossy by briefly exposing it to acetone vapors.  Put a glass jar with about 5mm of acetone in the bottom on your printer's bed and set the temperature for 100C.  Loosely screw a lid on the jar and wait for it to heat up and vaporize the acetone.  After a few minutes, when the sides of the jar are warm, open the lid and dangle the key fob from a piece of wire inside the jar without touching the sides or the acetone pool on the bottom.  Give it no more than 5 seconds and pull it back out.  Reclose the jar.  Let the acetone evaporate and the surface reharden for a couple minutes before touching the key fob.  If it isn't smooth and shiny enough for you, give it another 5 second exposure to the vapors.