In some works, a character will pull out a small piece of paper or metal, which will then unfold to an object many times its original size. In others, a large object will fold itself up into a smaller one. Either way, the object becomes much smaller than is at all reasonable (and may also change mass accordingly) through folding. A subtrope of Hammerspace and Toon Physics, and a supertrope of Telescoping Robot. May overlap with Transforming Mecha, Bag of Holding, Swiss Army Weapon. or Retractable Weapon. Examples: : : : : : : : :