Sandstone isn't a single, fixed size. It's a rock type, and its size can vary greatly depending on the formation and location. Here's a breakdown:

Size of Sandstone:

* Individual grains: The sand grains that make up sandstone are typically between 0.0625 and 2 millimeters in diameter. This is why it's called "sandstone".

* Outcrops: Sandstone formations can range from small pebbles to massive cliffs and mountains, spanning hundreds of feet or even miles.

Why is it called Sandstone?

Sandstone is called sandstone because it is primarily made up of sand-sized grains of mineral and rock fragments. These grains are cemented together by minerals like silica, calcite, or iron oxide.

Here's a simple analogy: Imagine a beach with sand. Now imagine that sand getting cemented together over millions of years, forming a solid rock. That's essentially what sandstone is!