Didn;t Worf use a smaller weapon in First Contact?
-Ed
Yes but it was a single blade curved dagger that looked more like a small falcata with an extra blade point coming out it prior to the the end. It wasn't shaped like the one in the surveillance photo.
The reason they called it that is possibly some replica dealer sold a miniature blade claiming it to be a bat'leth or even the Sword of Kahless but neither look like the one used in the robbery. But that has never stopped replica dealers from seling them as one.