PNG Image File Size For iPhone & Touch Wallpaper And Wallpaper Thumbnails
If you have the ability to upload Wallpaper files to your iPhone or your iPod Touch then you need to know the proper size. The default wallpaper files are located in the /Library/Wallpaper directory and include the default wallpaper files and the thumbnails for those wallpapers. To get the iPhone wallpaper to display correctly you need the proper sizes.