set a=1234567890123

if [%a:~0,-12%]==[] (
    echo a is shorter than 13
) else (
    echo %a% is longer than 12
)

set a=1234567890123

if [%a:~0,-12%]==[] (
    echo a is shorter than 13
) else (
    echo %a% is longer than 12
)

@echo off
setlocal enabledelayedexpansion
for /F "tokens=1 delims=" %%i in ('dir /o:-n /b /s') do (
    set filename=%%i
    set part=!filename:~0,260!
    if !filename! NEQ !part! echo !filename!
)

@ECHO OFF

SETLOCAL ENABLEDELAYEDEXPANSION

set Limit=%~1
echo Paths being found which exceed !Limit!
echo ======================================
type NUL > "!temp!tabulator.txt"
FOR /F "tokens=1 delims=" %%A IN ('dir /o:-n /b /s') DO (
set Test=%%A
call :_cnt_str_len
echo/!test!
echo/!_cnt_str_len!
timeout /t 100
rem :: call set Test=%%Test:~%Limit%%%.
IF "!_cnt_str_len!" GEQ "!Limit!" (
type NUL > "!temp!pathlengthdeterminationtemp.txt"
echo %%A > "!temp!pathlengthdeterminationtemp.txt"
FOR /F "tokens=1 delims=" %%H IN ('dir /s /o /b "!temp!pathlengthdeterminationtemp.txt"') DO set StrLen=%%~zH
del "!temp!pathlengthdeterminationtemp.txt"
set /a StrLen=!StrLen!-2
echo !StrLen!,%%A>> "!temp!tabulator.txt"
)
)

sort "!temp!tabulator.txt" /O "!temp!tabulator1.txt"
del "!temp!tabulator.txt"
TYPE "!temp!tabulator1.txt"
del "!temp!tabulator1.txt"

ENDLOCAL

goto :_end_of_file

:_cnt_str_len

if defined _cnt_str_len set _cnt_str_len=

for /f %%h in ('cmd /u /c set /p "=%Test:"= %"^<nul^|find /v /c ""') do (

     set _cnt_str_len=%%~h&& call set _cnt_str_len=!_cnt_str_len!

     exit /b

)

:_end_of_file