Can't change PowerShell font and window size on Windows 8.1
For Windows 8.1, in Start, find PowerShell.
Open file location. Open shortcut Properties (right click menu). Security tab → Edit your permissions to Modify.
Select Font tab (skip errors - nothing is set hence the problem). Select Font (I set Lucida Sans Size 16).
Apply (changes). Security tab Edit permissions remove modify. Apply. All done.
Is it possible that you are adjusting the Properties rather than the 'Defaults'? Also, I am with Keith; the Consolas fonts give you much large sizes than the Raster, and the Lucida Console give people problems.
I'm on Windows 8.1 and the only thing I ever do is start PowerShell via its shortcut then edit the console properties to my liking. I then launch PowerShell elevated and set the same settings. Usually that has me pretty well covered on Windows 8.1. Of course, if you then launch the x86 console for PowerShell you may need to configure it as well.