This papercraft is Sons of the Harpy's Mask, based on the American fantasy drama television series Game of Thrones, the paper model is created by Necrosster. The size of finished model is about 308 (H) x 200 (W) x 152 (D) mm.
The Sons of the Harpy are an underground insurgency group fighting the rule of Daenerys Targaryen over Meereen, composed of former slavers. They take their name from the harpy, the traditional heraldic symbol of the slave-masters in the Ghiscari cities of Slaver's Bay, and the Ghiscari Empire before them. They conceal their identities wearing masks that look like harpies.
You can download this papercraft template here: Game of Thrones - Sons of the Harpy Mask Papercraft Free Template Download