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.
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.