Okarun Mask from Dan Da Dan
I make it 2 version
1st is magnet version (I use magnet size 6*6*2 mm)with my original size
2nd is elastic version (I recommend this ver. cause it's so easy)
Adjust the size as you see fit but if you are not used to adjusting the size with slicer app, you can use heat gun and bend it with your hand (but this method won't perfectly fit your face)
Hope you success in the first try, enjoy printing.