Given a file it returns the file size from wc -c with the extra strings stripped off.

getFileSize.sh

#!/bin/sh

# Usage: ./getFileSize.sh myFile.exe

# Outputs file size of the given file

FILE=${1}

DIRTY=`wc -c ${FILE}`

CLEAN="${DIRTY}"
CLEAN="${CLEAN% *}"
CLEAN="${CLEAN##* }"

echo ${CLEAN}