Venice and masks have come together a long way since the old times. Back in the old days, Venetians wore masks not only for the famous Carnevale, but for almost any outing, e.g. dinner, casino, theatre, etc. Even the once rich, who lost all their money and resorted to begging, still wore masks as a way to hide their face and their shame.
Tragicomica shop offers wonderful hand-made Venetian costumes there. And if you have enough time, you can even learn how to make the wonderful Venetian masks yourself!