All sizes of wallpaper are the same - 1280 x 968 to cater for all large screens.
PC Users: To install your Only When I Laugh desktop wallpaper, right click on the image below (it might take a short while to arrive as its quite big), and select 'Set As Wallpaper'.
Mac Users: Click on selected image and drag onto your desktop (or hold down mouse button over image link and save file to desktop). Hold down the Control button on the keyboard while clicking on an empty area on your desktop. Select "Change Desktop background." Find the classictelly.com Only When I Laugh wallpaper image you've just downloaded and click on it.