The wind usually skips and bounces sand-sized particles for short distances. This process is called saltation.

Here's why:

* Larger particles are too heavy for the wind to lift and move easily. They might roll or slide, but they won't skip or bounce.

* Smaller particles (like silt and clay) are so light that they can be carried high in the air by the wind. They don't skip or bounce as much as sand.

So, sand-sized particles are the perfect size to be lifted, carried a short distance, and then bounced along the ground by the wind.