This Peggy Olson vinyl figure is released by Funko in their POP! TV x Mad Men vinyl figure series.
Funko POP! is a crossover vinyl figure series by Funko and other famous franchises such as Disney, Pixar, DC Comics, Marvel Comics, Simpsons, South Park, Uglydoll, etc. Each POP! figure is about ~3" to ~5" tall and crafted in a Japanese anime/manga super-deformed style (NOTE: due to the unique design of each character, the actual size of the figures may be smaller or bigger than stated).
The POP! TV x Mad Men series features characters from the TV series that is set primarily in the 1960s and focuses on the day-to-day business of the advertising agencies (initially at the fictional Sterling Cooper advertising agency on Madison Avenue in Manhattan, New York City, later at the newly created firm of Sterling Cooper Draper Pryce -- subsequently named Sterling Cooper & Partners), as well as the personal lives of the characters, thereby depicting the changing moods and social mores of the United States throughout the 1960s.