This Sara vinyl figure is released by Funko in their POP! Marvel x Doctor Strange in the Multiverse of Madness 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 Doctor Strange in the Multiverse of Madness series features characters from the superhero film of the Marvel Cinematic Universe franchise that sets a few months after the events of Spider-Man: No Way Home (2021), Dr. Stephen Strange, with the help of both old and new mystical allies, travels into the multiverse to face a mysterious new adversary.