For reference....I'm 5 feet 5.5 inches. It looks a bit odd, but if you have to wear it cross body, it isn't terrible. I don't really like how it looks so I wouldn't recommend it.
IMO, the bag is made to be worn on the shoulders single or double-strap, but if you have to be in a moment that you have to be hands-free, it can be worn crossbody.