Accidental double post, but it gives me a chance to give some (possibly) useful info, instead of just a snarky comment, as with my previous post.
My favorite swords are double-edged short swords. Probably the best example out there is the gladius. A sword of this size is small enough to keep around, yet big enough to be effective. If guns went away, I would keep my qama close by.
The other "sword" that I consider practical is the kukri. Just about any size is available, and they carry well. The Gurkhas have shown that a kukri can be part of one's daily kit. I personally like a plastic sheath with a partially open front and a snap and strap across the spine of the blade, near the handle, to hold it in place. The kukri is better than most swords as a tool for doing work, while maintaining its usefulness as a weapon. I remember watching a construction worker in Mendocino County, CA using a kukri as a drawknife for shaving a long pole. Try that with a double-edged sword.
All my best,
Dirty Bob