I had a Montague frame built single speed with 24" wheels, front brake only, that I managed to fit inside a hockey bag along with some foam padding. I also loosen up the handlebars (which I narrowed) for bagging.
I'd say it's about 62 linear inches, but due to the irregular shape of the bag, it's difficult to measure. With a floor pump, essential bike tools and a few spare tubes in the bag, it weighs about 30 pounds.
I've had no problems bringing it with me on vacation, but it's not a bike that I would tour with. It's built to get around beach resorts and a 15km radius, and to be virtually unbreakable, with as little maintenance as possible.