Sai Sai no Mi

The Sai Sai no Mi is a Paramecia-type Devil Fruit that gives the user the ability to control the size and mass of objects, making them a Size-Modification Human (サイズ変更人間, Saizu Henkou Ningen). It was eaten by Sun Wukong, the Monkey King.

Trivia

 * Sun Wukong's usage of the Sai Sai no Mi's powers with his staff directly parallel the Ruyi Jingu Bang, Sun Wukong's staff from Journey to the West, which had the ability to extend in length and expand in size.