Project Details: http://yzrandome.blogspot.com/2012/06/darker-than-black-heis-dagger-replica.html
Sheath for my 16" overall length metal Hei Dagger. Has a little belt loop an opening of 1.375" x 0.1875".
Since the 3d printed dagger prop has the same overall dimensions it should technically fit this, but with the tolerances of 3d printinng and any extra thickness the paint and sealer you use may add it is hard to say. Additionally the rough surface of this sheath may cause wear to the prop dagger during sheathing/unsheathing as it is relatively close fitting.