This papercraft is Daedric Sword, a One-Handed weapon from the game The Elder Scrolls V: Dawnguard, the paper model is created by ZombieGrimm. The finished model measures about 4 ft. There is a Daedric Greatsword Papercraft on the site available; and also another Daedric Sword Papercraft.
Daedric swords are somewhat visually similar to scimitars. They have a curved handle and a serrated edge, with the exception that the Daedric sword has a much darker color, and contains sharper edges around the hilt. They also have a very similar design to Daedric Armor.
The Daedric sword requires a Smithing level of 90 and the Daedric Smithing perk to create. It can be upgraded with an ebony ingot at a grindstone and benefits from the Daedric Smithing perk, which doubles the improvement. [Source: wikia]
You can download the papercraft model here: The Elder Scrolls V: Skyrim - Daedric Sword Free Papercraft Download