Here's a quick print for the holidays. The ornament is only 23mm wide and you can print a batch of 6 of them in under 20 minutes. This is designed to hang on mini trees.

Not for commercial use. Please see license agreement.

There's a tiny hole at the top so you can run a loop of thread through the ornament to hang them.

There's no need for supports, rafts and at 0.9mm thick, you should just print them solid. Either set infill to 100% or make sure the top and bottom thickness add up to 0.9mm or more.