# What is the pixels to units property in Unity sprites used for?

I'm starting to learn Unity for 2D development.

So, I am importing several sprites into the game, and I couldn't help but notice that there is a "pixels to units" property, by default on 100. I normally set it to 1. Is there a reason why I would need to have this value different than 1? Or, more generally, is there a reason to have multiple sprites with different

• A higher pixels to units setting would require more force to move one unit than a lower pixels to units setting. Isn't it the other way round? Lower setting = larger object in the physics simulation (eg. setting it to 1 with a sprite that is 200 pixels tall will make the sprite 200 meter tall in the physics engine). – bummzack Sep 15 '14 at 7:22