How much HD space is needed for Yosemite?

[ColdShadow]

How much Hard disk / SSD does Yosemite (final version not beta) occupy?
I'm in process of buying a Macbook Air and was wondering about that,since I'm leaning towards 128GB SSD setup.

 

[Alimar]

How much Hard disk / SSD does Yosemite (final version not beta) occupy?
I'm in process of buying a Macbook Air and was wondering about that,since I'm leaning towards 128GB SSD setup.

The DL was 5.21 GB.

 

[ColdShadow]

The DL was 5.21 GB.

I mean the hard disk space it takes after installation..