Painstakingly made in tinkercad. I took the headband from a different design, and warped one of the premade shapes available in tinkercad in order to make the ear parts.
There are a couple errors with this model if you take a close look, but it prints fine and looks fine.
It's surprisingly comfy. I made it for my princess carolyn costume (bojack horseman) and I'll upload pics once I've completed the whole costume. Also working on making princess carolyn's necklace, and I'll upload the stl for that once I'm done.