The Windows 8 ecosystems offers you a broad set of tiles to improve the user experience. I always forget the list of available templates so this one is for me; a link to the tile template catalog so I can never forget the list of available options: http://msdn.microsoft.com/en-us/library/windows/apps/hh761491.aspx.
The template catalog lists the tile templates available for use in a tile notification, with pictorial examples of each together with their XML content.
Note that when they are displayed on a computer set to a right-to-left (RTL) language, templates are flipped from their left and right descriptions here.
In the static or peek templates that display an image collection, the larger square image is not quite square; it is slightly wider than it is tall. If you supply a square image, the image will be scaled for width and slightly cropped on the top and bottom.