This Steppenwolf vinyl figure is released by Funko in their POP! Heroes x Justice League 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! Heroes x Justice League series features characters from the live action movie based on the DC Comics superhero team of the same name. It is the 5th installment of DCEU (DC Extended Universe). In Justice League, fueled by his restored faith in humanity and inspired by Superman's selfless act, Bruce Wayne enlists newfound ally Diana Prince to face an even greater threat. Together, Batman and Wonder Woman work quickly to recruit a team to stand against this newly awakened enemy. Despite the formation of an unprecedented league of heroes -- Batman, Wonder Woman, Aquaman, Cyborg and the Flash -- it may be too late to save the planet from the catastrophic threat of Steppenwolf and his army of Parademons.