Setting Partition sizes?

[slandur]

I'd like to make custom partition sizes. I currently have one command I have created that launches OSD, selects the proper index number, and makes sure everything is zero touch for me. I had so much trouble setting up the automate and the json, but i've figured out the command below works perfectly. Any recommendations on setting the partition sizes? Intune doesn't like it when they aren't big enough so I'm hoping this is easy. If I must use a JSON, i'm ok with that, I just need some guidance.

Edit-OSDCloudWinPE -WorkspacePath C:\OSDCloud -CloudDriver * -StartPSCommand "cmd /c '(echo 1 & echo 5) | powershell -command Start-OSDCloud -ZTI -FindImageFile -Firmware -Restart'"