The packaging for products always needs to be pretty specific. However, there is such a thing as too specific when the name of the product actually describes the shape already. Bells are great ornaments, as they can be hung along the bottom of a Christmas tree to jingle whenever anyone walks by or tries to sneak a present out from underneath the tree before Christmas morning. Bells always have a certain shape though.
If you guessed that it is a bell shape, then you would be correct. That is also exactly what this packaging describes - bell-shaped bells.