What's the Name and Size of Guts' Sword in 'Berserk?

Guts' mighty sword seems to be a match for any foe he encounters in Berserk. A weapon so unmatched must have a special name, right? So, what is it?

Berserk: The Dragonslayer, Explained

The Sword Library: Dragonslayer

Sword of the Berserk: Guts' Rage - IGN

Swords of Guts, so why is no one making a flash game yet? : r/Berserk

Guts, Heroes Wiki

Berserk-dragonslayer-sword 3D models - Sketchfab

I understand muira had decent trouble properly scaling the dragon

How heavy is Gut's sword from Berserk? - Quora

Guts, VS Battles Wiki

Berserk (manga) - Wikipedia