Install size of game v3.21

You can find our minimum and recommended system requirements from our Steam page here, I have also listed these below for you:

MINIMUM:
OS: Windows 7 SP1/Windows 8
Processor: Quad core 2.6GHz x86-compatible
Memory: 8 GB RAM
Graphics: NVIDIA® GeForce® GTX 650 Ti or ATI Radeon™ HD 7850
DirectX: Version 11
Network: Broadband Internet connection
Storage: 40 GB available space

RECOMMENDED:
OS: Windows 10
Processor: Quad core 3.2GHz x64-compatible
Memory: 16 GB RAM
Graphics: NVIDIA® GeForce® GTX 1050 Ti or ATI Radeon™ RX560
DirectX: Version 11
Network: Broadband Internet connection
Storage: 40 GB available space
Additional Notes: Solid state storage is recommended

They are a little outdated. Sorry about that. I believe the current specifications should be:

MINIMUM:
OS: Windows 10
Processor: Quad core 2.6GHz x86-compatible
Memory: 8 GB RAM
Graphics: NVIDIA® GeForce® GTX 650 Ti or ATI Radeon™ HD 7850
DirectX: Version 11
Network: Broadband Internet connection
Storage: 40 GB available space

RECOMMENDED:
OS: Windows 10
Processor: Quad core 3.2GHz x64-compatible
Memory: 16 GB RAM
Graphics: NVIDIA® GeForce® GTX 1050 Ti or ATI Radeon™ RX560
DirectX: Version 11
Network: Broadband Internet connection
Storage: 40 GB available space
Additional Notes: Solid state storage is recommended

You should be able to view the Steam page here:

https://store.steampowered.com/app/238960/Path_of_Exile/