Multi-piece skeleton mask
I've been working on this over the past week to enter into the 2017 costume challenge, and it looks like I managed to get it in before the deadline!
The mask is printed in four separate pieces and attached to a balaclava. Assuming the pieces fit your head nicely, the jaw and brows should be able to move with your face! I printed all the parts at a scale of 19 (1900%) to fit my head which is six inches wide. Adjust accordingly.
The MaskUpper and both brows require support material, but the jaw can print without any.