A replacement model for the bezel of Pebble Time Round that covers electronics around the display. I broke mine, so I tried to come up with something that works decently well. It's not perfect, but works well enough. In darker environments and depending on your material, the backlight can be visible through the plastic, since it's only a small layer. The original bezel includes a antenna for Bluetooth, but at least for short ranges, it doesn't seem to be strictly necessary.

I'd recommend printing with 0.1 mm layer height, possibly smaller nozzle if you have one, and you can choose more perimeters if you want.