This papercraft is a T-60b Helmet, a part of the T-60 Power Armor, based on the Fallout video game series, the paper model is created by Anton Zaytsev. The size of finished model is about 384 (H) x 244 (W) x 280 (D) mm.
There is another version on the site: Fallout 4 - T-60b Helmet Papercraft Ver.1.
You may get this papercraft template here: Fallout - Life Size T-60b Helmet Papercraft Ver.2 Free Template Download