This Rhaegal figure is released by Funko in their POP! x Game of Thrones Vinyl Figure series.
POP! is a crossover vinyl figure series by Funko and other famous franchises such as Disney, Pixar, DC Comics, Marvel Comics, Star Wars, Simpsons, South Park, Uglydoll, etc. Each POP! figure is 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! x Game of Thrones series features characters from the hit TV drama, which tells the story of the fictional continents of Westeros and Essos.