Disney’s official collectible plush series featuring small stackable characters is called Tsum Tsum.
The toys use a distinctive rounded, horizontal shape that lets collectors place one character on top of another. Disney based the concept on stacking, and the name comes from the Japanese word tsum, meaning “to stack.”
The line began in Japan and grew into a large merchandise range featuring characters from Disney animation, Pixar, Marvel, and Star Wars. Besides plush toys, the Tsum Tsum brand appeared on accessories, stationery, clothing, games, and other collectible products.
Tsum Tsum should not be confused with generic Disney plush toys. The name identifies a particular design system and product line, not every small Disney stuffed character. Different sizes and special editions exist, but the compact stackable form is the defining feature of the series.