Ten solid feet of steel nearly two feet wide.
Really ten foot sword in a underground cave system.
Do the math 6’3 man carrying the sword at his waist would mean 6-7 feet of sword sticking out. If he unsheathed the thing and held the thing at waist level the ceilings would need to be 14-15 feet high. If it was on his back 4 feet would stick out over his shoulder.
I don’t think the author contemplates what he writes. This isn’t one piece where Mi-hawke somehow carries a sword 2x bigger than himself.

