The brides maid's dress she wore was so superfluous that it almost topped the brides wedding dress.
It would be 'superfluous' for Jane to buy another pair of shoes since she has a closet full of them. 'Superfluous' means exceeding what is needed or being wasteful.
The superfluous work had to be done even though we had already finished the project.
Sandy had a superfluous amount of candy, so she shared the rest with her friends.