Why hair particles not showing the result Im making a grass compound wall. I have a plane and given green color and added the hair particles default settings.

Default hair particle

Press shift+z to render the hair particles showing rectangular shapes and not hairs. I want to have grass effect.
Hair showing rectangular shapes

Any suggestion or help why the hair particles showing the rectangular shapes other than hair particles.
In the very bottom of the Particle Settings you will see a section called Cycles Hair Settings. Change the 3 options:


Root
Tip
Scaling


These should make your hair thinner to your choice.

Settings section: