This Groot vinyl figure is released by Funko in their POP! Marvel x Guardians of the Galaxy Holiday Special 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 Guardians of the Galaxy Holiday Special series features characters from the American television special written and directed by James Gunn for the streaming service Disney+, based on Marvel Comics featuring the superhero team Guardians of the Galaxy. It is the second Marvel Studios Special Presentation in the Marvel Cinematic Universe (MCU), sharing continuity with the films and television series of the franchise. The special is produced by Marvel Studios, and follows the Guardians of the Galaxy as they celebrate Christmas and search for a present for their leader Peter Quill.