Whether unique or smithable, what is the longest dagger in Skyrim? I know it does not effect the reach of the blade and I'm not picky on damage (it's a dagger, best case scenario 30x damage). It's just that, I know some weapons are longer than others, though length and weight don't reflect on any combat aspects, I need the dagger that looks the longest. 
I cannot find any chart detailing length, or picture of all daggers, scaled equally, to determine which is longest. 
The best I can do is drop them from my inventory and eyeball which looks longer. So far steel dagger wins. But anything will help at this point.