Deka Deka no Mi

The Deka Deka no Mi is a Paramecia-type Devil Fruit that allows its user to increase their size, making the user a Gigantification Human (巨大化人間). It was eaten by Sanjuan Wolf.

Etymology

 * Dekai (でかい) means "huge" in Japanese.

Strengths and Weaknesses
The Deka Deka no Mi grants its user the ability to increase their size. It is unknown how tall the ability could make a human, but in the use of the giant Sanjuan Wolf, it has increased his height to about 10 times the height of an ordinary giant.

No particular weaknesses are known for this ability apart from the standard Devil Fruit weaknesses.

Usage
Sanjuan Wolf, who was a giant from start, has used this ability to become the largest person in the world, with a maximum height of 180 m (590'6"). Despite being weak against water, he is tall enough to stand in the ocean, though he did mention that doing so was exhausting to him.

Past
Wolf ate this fruit sometime prior to being imprisoned in Impel Down.

Trivia

 * The Deka Deka no Mi is the inverse of two non-canon Devil Fruits:
 * The Mini Mini no Mi which turns the user smaller. Coincidentally, both were eaten by giants, and both seem to use their transformed state as their default form.
 * The Moa Moa no Mi which turns other objects bigger.