My wife and I have a Samsonite bag that measures 24" High, 14" Wide & 10" Deep and fits perfectly in the truck with the divider in place so the top will stow. Fits like it's made for the roadster. More than enough room for a weekend trip.

Interesting that someone posted that the original Crossfire luggage doesn't fit either. I always figured that was the point in having the original luggage. Made to fit so you could put the top down.