Setting the default column size in Mac OS X Finder windows
Mar 25, 2010 - 9 Comments
The Mac OS X Finder’s column view is really handy, but unless you set the default column width, anytime you launch a new Finder window the columns size will be reset. Changing this behavior is very simple, hold down the Option key while dragging the columns to your desired width/size, and this will become the new default.

It actually worked with command key and not option key for me.
Great tip thanks! I also noticed holding down the Option key whilst changing the window size affected the default window size.
Best tip ever!
Option works fine here… but… what is default? how to reset? commandline writing to a pref file somewhere?
Here here! Great tip—I wonder how much time [and always added frustration] I went through increasing the size for each new window
Hi, thank you for all your tips&tricks. I have a problem with Finder, since i didn’t yet figure out how to change default finder window size; i don’t mean the window that appears when you press command+N, but the one that is open when you create a new folder.
Any suggestion is appreciated.
yeah, how do we get the default size back?
Another handy and related tip: Double Click on the Column Sizing Handle to Auto Size to the longest file name.
>Auto Size to the longest file name.<
how can this be made the default?
thx
b