Edit 5/1/2017 : I received a message from from a Thingiverse member they printed this mask at 105% and it fit well. They were an adult male.
This is a mask I designed from pictures of Army of Two paintball masks. I would not
recommend using this mask for paintball protection.
This should fit an adult male but I have not printed it out yet to confirm this.
I added decals to the picture renders to give ideas how you could customize this mask.
I design props and costumes mostly. I am not an engineer nor a trained artist. I learned almost everything from watching Youtube videos and just messing around in designing software. I started designing with Fusion 360 in August 2016.