Not 100% sure what you want, paddles are always oversize, a split paddle is around 1200 long. 55 inch is 1400 which could be a long sprint paddle that would just fit in the bag, and if you put two pairs they need room as well. Then bags are made that long by all of the manufactures.
A paddle travel bag is much more than just a paddle bag, it has dry zones and plenty of storage and of course designed to stop paddles from being damaged which is most important in my eyes.