These are notes from Schola San Marco’s Fiore Seminar in November 2013.
I was under the impression that Fiore used a single sword for both one and two handed work. After reviewing some high resolution Getty scans the instructor convinced me that that isn’t true.
Consider this play, found in both the one-handed and two-handed section. The orange and red sword lines are same length as the vertical lines of the matching color.
There is no doubt that the second set of fencers are using significantly longer swords. The two-handed swords are roughly shoulder high while the one-handed swords are merely to the base of the sternum.
As for the handles, they should be 7″ and 13″ respectively. I forgot to ask where he got those numbers, but I remember the presenter stating that an inch is three barleycorns and thus varied by the species of barley grown in each area.