windows - Unable to execute FOR loop from batch file

I am trying to execute the following command from inside a batch file:

@echo off & for /f "delims=*" %A in ('dir /s /b') do echo %~fA %~zA >> "\path\to\output.txt"

I found this command from another thread. It prints out the entire file listing along with the file size.

I am able to execute this just fine when pasting into a command line window, but when I throw it into a batch file nothing happens. Am I missing something? Why would this failed when executed from a .bat?