This is a head-base that can be used to build a puppet-, plushie-, robot- or a fursuit-head (costume). Ventilation holes were added for better heat-exchange. The lower jaw is movable.
I did not include the model for the ears (you do not want rigid ears on a costume, trust me) - use a felt or foam sheet instead.
The model is scaled for costume size (it's about 4cm wider when my own head - I have a small head) - rescale it if you need to. I recommend making the head at least 23cm wide for costume use (this head has smaller cheeks). The current size is for larger heads.