This T'Challa vinyl figure is released by Funko in their POP! Marvel x Black Panther 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 Black Panther series features characters from the 2018 live action superhero movie based on the Marvel Comics character of the same name. In Black Panther, T'Challa returns home as king of Wakanda but finds his sovereignty challenged by a long-time adversary in a conflict that has global consequences.