Here's a simple command to get human-readable sizes of files and folders inside of the current directory. (I've tested it on macOS' Terminal and Linux.)
du -sh -- *
# 124M backups
# 523M downloads
# 1.8G recordings-hijack
# 673M recordings-obs
# 392K recordings-zoom
# 403M settings
Note that you may have to sudo if you're trying to get sizes for files that require sudo permissions.