linux ls see file size code example

Example 1: list file size as mb

ls -l --block-size=M

Example 2: ls human readable size

du -sh directory_name    #Gives you the summarized(-s) size of the directory in human readable(-h) format
du -bsh *                #Gives you the apparent(-b) summarized(-s) size of all the files and directories in the current directory in human readable(-h) format