There are many different types of leaves in the world, and they come in all sorts of shapes and sizes. So, it is hard to say definitively which is the smallest leaf in the world. However, there are some leaves that are very small compared to others. For example, the leaves of certain mosses and liverworts can be just a few millimeters in size. And there are also some tiny parasitic plants that have leaves that are even smaller than that! So, while we cannot say for sure which is the smallest leaf in the world, there are certainly some contenders for the title.
