This is mask is from the Thor Ragnarok movie. Its one of the Sakaar Junker's mask seen in the trailer/movie. I did not have a ton of reference pictures to use to design this but I had the help of Sivl32 (https://www.thingiverse.com/Sivl32/about) to figure stuff out, Thanks.
The helmet is sized to fit an adult male but check the PDF file for measurements. Units are in millimeters.