This Powershell script can be used to calculate package sizes for multiple packages in ConfigMgr. You can select which package/s you want to calculate the sizes for in a window, or optionally select a console folder and calculate the total size of all packages in that folder.
The total size of all selected packages will be reported, and using the -Verbose switch, individual package sizes are reported too.
It will work for almost anything in the Software Library, including:
- Standard Packages
- Driver Packages
- Software Update Packages
- OS Image Packages
- Boot Image Packages
Full description on my blog: