As you can see on the official web page, the installer of Garena - League of Legends has 3.9GB. Also, the game itself requires the following minimum configuration:
- Processor: 2 GHz;
- Memory: 2 GB RAM or more;
- Hard Disk Space: 8 GB;
- Video card: Shader version 2.0 capable;
- Support for DirectX v9.0c or better;
- OS: Windows XP (Service Pack 2 or 3), Windows Vista, or Windows 7.
