Any app that will automatically size and lock Finder windows?
FinderMinder resizes Finder windows when they are opened. There is a small delay before windows are resized and you have to keep it running on the background though.



I use this script to reset the properties of windows manually:

tell application "Finder"
    if number of windows is 0 then return
    tell Finder window 1
        set toolbar visible to false
        set sidebar width to 0
        set statusbar visible to false
        set current view to column view
        set bounds to {474, 250, 1318, 750}
        tell its column view options
            set shows icon to false
        end tell
    end tell
end tell


When you move or resize a window, Finder saves its dimensions to a .DS_Store file. You can make all folders use the default dimensions by deleting .DS_Store files:

sudo find / -name .DS_Store -delete &amp;&amp; killall Finder


It also removes Spotlight comments, resets the positions of icons in icon view, and removes folder-specific sorting modes and view options.