(because listing all the costumes of the Wasp would have taken forever)
Nowadays, Natalia "Natasha" Alianovna Romanova owes a lot of her popularity to her portrayal by Scarlett Johansson in the movies of the Marvel Cinematic Universe. However, she's actually one of Marvel's oldest characters, dating all the way back to the Silver Age and debuting in Tales of Suspense #52 (1964).
Originally, the Black Widow was a Soviet spy with very little combat training. More of a femme fatale than a fighter, she would rely on her beauty to steal state secrets or manipulate others into doing so. For this reason, her original outfits were regular dresses, albeit glamorous and elegant, complete with jewellery and accessories. She was also a smoker, occasionally seen with a cigarette holder, and her hair was black instead of red.

