Since it is designed not to require a supports.
(It depends on which printer you are using)
It is not necessary to post-process after output.
The default size is suitable for 12-inch(1/6) figure model face.
In this case, The face of figures are not uniform in size.
So, the part that fixes the chin strap is adjustable.
If you want to print in the size of the picture, enlarge it to 110%.
In this case, the output of the chin strap is not necessary.
It is recommended to use PLA source thingiverse