Ever since the release of Windows Phone 7, the Metro UI and the metro icons have become very popular. Now the same UI is being carried forward to Windows 8 as well. There are many apps like Mosaic, Easy Notepad, Metro Backup which sports this UI. The icons with the Metro style have also been popular when it comes to design. If you are looking for some free Metro styles icons for Windows, then you can probably try this pack. Free Windows Metro Icons is a set of beautifully designed application icons for Windows.
The icon collection is supplied in black and white versions, with and without circles. The icon file format is PNG and comes with a total of 135 files. The icons are of size 48X48 pixels.