I would like to know the size of SVN branch before Checkout that branch in my Mac. So is there any way to know the size of branch in Cornerstone or via terminal commands?
Using svn ls for the root of remote branch URL (see manual for the proper options: -v -R), you can calculate size of all files in branch. Beware: real space requirements will be (slightly) bigger, because uou have to store also some metadata in .svn folder in your WC