That's what I'm wondering? I've never seen a razor that required a 12" blade. Maybe it's for Hagrid's razor.
I’m an old fart and I remember when barbers would take a straight razor that flips open and they would shave my neck hairs, I guess its a lost art.
Opened up it would be 12” long.
I am a fan of the Mythbusters but it soured me when I heard they allowed an impostor on their show, who knows maybe the will “Mythbust” Obama in the future?