These are a pair of small furry ears. Like the Little Wolf Girl, one of the ears is flopped over.
These come with a molded threaded post to insert into the head. You will need to drill through the head and wig (if any) to be able to screw these in. DO NOT try to force them in. If the hole is to small, make it larger and try again. A drop of super glue will make the attachment permanent.
Head or other body parts are there just to model the accessory.