Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2528095.

Edit : 9/13/2017 Added a version with holes for strap.

Red X Mask from Teen Titans. I was messing around in 3D Coat and made this mask. Thought it is looked good enough to post so here it is

It should fit an adult male. it is ~170mm wide ~283mm height and 165 mm deap.