This papercraft is Mehrunes' Razor (aka The Dagger of the Final Wounds, Bane of the Righteous and Kingslayer), a Daedric artifact found in the game The Elder Scrolls V: Skyrim, the paper model is created by Egor Demidchenko. The size of finished model is about 460 (H) x 151 (W) x 43 (D) mm.
There are other three versions on the site:
Razor of Mehrunes Dagon Papercraft
Broken Mehrunes' Razor Papercraft
The Elder Scrolls V: Skyrim - Mehrunes' Razor Ver.2 Papercraft
You can download the papercraft model here: The Elder Scrolls V: Skyrim - Mehrunes' Razor Ver.3 Free Papercraft Download