You will be glad to hear that the Battlefield 1 system requirements for PC have now been released by DICE and the total size of the game is 50GB.
You can check the requirements out below to see if your PC is battlefield ready, and if not will you upgrade your PC for this game?
Battlefield 1 System Requirements
Minimum Requirements
OS: 64-bit Windows 7, Windows 8.1 and Windows 10.
Processor (AMD): AMD FX-6350.
Processor (Intel): Intel Core i5 6600K.
Memory: 8GB RAM.
Graphics card (AMD): AMD Radeon™ HD 7850 2GB.
Graphics card (NVIDIA): NVIDIA GeForce® GTX 660 2GB.
DirectX: 11.0 Compatible video card or equivalent.
Online Connection Requirements: 512 KBPS or faster Internet connection.
Hard-drive space: 50GB.
Recommended Requirements
OS: 64-bit Windows 10 or later.
Processor (AMD): AMD FX 8350 Wraith.
Processor (Intel): Intel Core i7 4790 or equivalent.
Memory: 16GB RAM.
Graphics card (AMD): AMD Radeon™ RX 480 4GB.
Graphics card (NVIDIA): NVIDIA GeForce® GTX 1060 3GB.
DirectX: 11.1 Compatible video card or equivalent.
Online Connection Requirements: 512 KBPS or faster Internet connection.
Hard-drive space: 50GB.