The image size must be of maximum 1920 pixels wide and 1080 pixels high including any borders and be a maximum File Size within 1MB. The files must be in JPEG format at 72 dpi resolution. The title should be in English and the maximum length 35 characters including spaces. No special characters such as !@#$%^&*()+/?<> ''"" etc. are allowed ; only space, dash (-) and underscore ( _ ) are allowed in file naming besides a-z, A-Z and 0-9.