This Mr. Knight vinyl figure is released by Funko in their POP! Marvel x Moon Knight 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 Moon Knight series features characters from the American television miniseries that follows Marc Spector and Steven Grant, two alters of a man with dissociative identity disorder (DID), as they are drawn into a mystery involving Egyptian gods.