Tuxedo describes a coat, not a breed: a bicolor cat, usually black and white, with a white chest that looks like a shirtfront and often white paws, chin or a facial blaze. Grey-and-white tuxedos exist too. The pattern comes from white spotting in the KIT gene, and because it isn't sex-linked, males and females are about equally common.
Most tuxedos are domestic shorthairs weighing roughly 6 to 14 pounds, though the pattern also appears in breeds like the Maine Coon and Persian, which can mean longer coats and more brushing. Stories about tuxedos being unusually smart or bold are fun but unproven. In Bentonville, where many cats live indoors, what counts is the cat's age, energy and coat, not the tie-and-tails look.