This Olaf vinyl figure is released by Funko in their POP! Disney x Olaf Presents 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! Disney x Olaf Presents series features characters from the animated comedy miniseries of shorts that features Olafretelling the stories of Disney films. The series was inspired by a scene in Frozen II where Olaf recaps Frozen. The series received positive responses, particularly for its humor.