What is the correct icon size for Newsstand shelf in iPod? I tried google but not getting any exact answer.
All size for these kind of image can befound in the Apple iOS HIG, there is a section Newsstand Icons.
All Newsstand apps need to supply a Newsstand cover icon that represents the default cover art in the App Store. The long edge of this icon should measure at least 512 pixels (1024 pixels for high-resolution devices). Note that this icon is separate from the app icon that all iOS apps must provide.