how to find the file size in unix

Anybody can help

HOW TO FIND THE FILE SIZE IN UNIX

Did you try

'ls -l'

To get filename and its size only:

ls -la | awk '{print $9, "\t", $5}'

You Can use
du -k filename

Thanking you to all who have given reply to my faq.

ls -ltrS

will display all the files based on their size in a particular directory in reverse order.