This Janet Van Dyne vinyl figure is released by Funko in their POP! Marvel x Ant-Man and the Wasp 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! Marvel x Ant-Man and the Wasp series features characters from the superhero film that is intended to be the sequel to 2015's Ant-Man. Set between the events of Captain America: Civil War and Avengers: Infinity War, Scott Lang, now under house arrest after the events of Civil War, tries to balance his home life as a father with his responsibilities as Ant-Man. When Hope van Dyne and Hank Pym present him with a new mission to bring to light secrets from their past, Lang teams up with Van Dyne as the new Wasp.